Draw in your notebook the symbols to represent the following components of electrical circuits: Connecting wires, switch in the OFF position, bulb, cell, switch in the ON position, and battery. Answer: (c) the pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet. Both of these generators produce electrical power based on the principle of Faradays law of electromagnetic induction.. 1. (c) at a point located in the plane of the paper, on the north side of the wire (a) more at the ends than at the centre Alternating current (a) Flemings right hand rule So the temperature when both the Celsius and Fahrenheit scales are the same is -40 degrees. 3. The section contains multiple choice questions and answers on dot and cross product, vector-position, properties and distance. These valves are activated by the flowing material in the pipeline. 1. 4. The impedance offered by the system to the flow of zero sequence current is known as zero sequence impedance. (a) directly above the wire To understand armature windings in a DC generator, we first need to understand pole pitch, coils, and coil span.. What is Pole Pitch? 5. (d) 220 V. 1. (b) directly below the wire (c) there are momentary galvanometer deflections that die out shortly; the deflections are in the same direction. The field lines are denser near the poles, which indicates that the magnetic field is stronger at the poles. Magnetic field lines are the lines in a magnetic field whose tangent indicates the field direction at any given position and whose density gives the field magnitude. An electric motor is rotating device that converts energy to energy. Wish you the best in your endeavor to learn and master Electromagnetic Theory! A computer network is a set of computers sharing resources located on or provided by network nodes.The computers use common communication protocols over digital interconnections to communicate with each other. Magnetic field and field lines: The influence of force surrounding a magnet is called magnetic field. If you have any queries regarding Magnetic Effects of Electric Current CBSE Class 10 Science MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon. We hope the given NCERT MCQ Questions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current with Answers Pdf free download will help you. Question 1. Some important properties of magnetic field lines are listed below . Question 14. Each paper writer passes a series of grammar and vocabulary tests before joining our team. Answer: (c) if magnetic field lines are parallel and equidistant, they represent zero field strength. Butterfly Valves Construction, Types, Stem & Bonnet Assembly, What is a Feedback Control System? (c) if magnetic field lines are parallel and equidistant, they represent zero field strength The formula of electric field is given as; E = F /Q. Mathematically, it can be represented as a vector field which can be plotted as different sets on a grid. Magnetic field lines can be drawn using a compass needle. The direction of magnetic field produced by a current carrying conductor can be found out by using Connect, collaborate and discover scientific publications, jobs and conferences. Start practicing now for exams, online tests, quizzes, and interviews! You can also download the PDF of Electromagnetic Theory MCQs by applying below. Magnetic field lines never intersect with each other. Magnetic flux is the total number of magnetic field lines passing through a particular area. Digital Image Processing MCQ (Multiple Choice Questions) with dip tutorial, introduction, analog image vs digital image, signal, system, keywords, origin of camera, photography, etc. Now diagnosing the problem becomes much easier with the help of the invention of X-Ray, Ultrasonography, ECG, MRI, Penicillin, etc. Consider two points A and B. The current which reverses its direction periodically 2022 Reproduction without explicit permission is prohibited. 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MCQs in all electrical engineering subjects including analog and digital communications, control systems, power electronics, electric circuits, electric machines Red. The magnetic field is stronger at the poles because the field lines are denser near the poles. The set of vectors are connected with lines. These interconnections are made up of telecommunication network technologies, based on physically wired, optical, and wireless radio-frequency methods that These valves are fully closed when the flow reaches zero and prevent back flow. Choose the incorrect statements from the Be the first to get exclusive content straight to your email. (c) use of stabilizers Answer: (d) there are momentary galvanometer deflections that die out shortly; the deflection are in opposite directions. This was changed around the time of Celsius death in 1744, by two eminent contemporary scientists working independently of each other Frenchman Jean-Pierre Christin and Celsius fellow Swede Carolus Linnaeus. (d) relative strength of magnetic field is shown by the degree of closeness of the field lines. Seating is either metal-to-metal or metal seat to composition disk. (c) A if the current is small, and B if the current is large (d) B if the current is small and A if the current is large. Answer: (d) In India, the AC changes direction after every \(\frac{1}{50}\) second. These rules do not determine the magnitude but instead show the direction of any of the three parameters (magnetic field, current, force) when the direction of the other two parameters is known. In the arrangement shown in the figure there are two coils wound on a non-conducting cylindrical rod. No tracking or performance measurement cookies were served with this page. Full membership to the IDM is for researchers who are fully committed to conducting their research in the IDM, preferably accommodated in the IDM complex, for 5-year terms, which are renewable. 5. A PLC can be programmed according to the operational requirement of the process. All for free. 7. Question 6. Electrical Engineering MCQs Need help preparing for your exams? Q.20. (c) Field lines can cross each other Question 9. Electric field can be considered as an electric property associated with each point in the space where a charge is present in any form. 2022 Reproduction without explicit permission is prohibited. All Rights Reserved. Full membership to the IDM is for researchers who are fully committed to conducting their research in the IDM, preferably accommodated in the IDM complex, for 5-year terms, which are renewable. Straight body swing check valves contain a disk that is hinged at the top. Electric motor If the key in the arrangement figure given below is taken out (the circuit is made open) and magnetic . 3. Magnetic field lines form a closed-loop. The difference between the direct current and alternating current is that the direct current flows in direction, whereas the alternating current its direction periodically. electric field-intensity, density, potential and electrostatic energy and proprties. Reason : The electric field lines of the charged rod are perpendicular to the surface of conductor. A PLC can be programmed according to the operational requirement of the process. ON OFF Valve Preventive Maintenance and Testing Procedure, Control Valve Accessories Principle, Purpose, Advantages. The strength of magnetic field inside a long current carrying straight solenoid is This condition can be partially corrected by using an external lever and weight. Question 8. (b) 250 V Magnetic field in a solenoid formula is given as B = 0 nl. The direction of magnetic field at a point will be North to South -. A constant current flows in a horizontal wire in the plane of the paper from east to west as shown in the figure. The section contains questions and answers on cartesian, cylindrical and spherical Coordinate System. F = (F * 9/5) + 32 F (F * 9/5) = 32-4/5 * F = 32 F = -32 * 5/4 F = -40. In the manufacturing industry, there will be a need for reprogramming due to the change in the nature of production. Access NCERT Solutions for Class 7 Science Chapter 14 Electric Current and Its Effects. The figure here shows electric field lines. Worldwide demand for electric cars is on the rise, while the driving public also those of us unwilling to make the move away from conventional drive systems dreams of ever more individually designed cars. It will immensely help anyone trying to crack an exam or an interview. 2. Since this matched the arrangement of the other scales then in use (Fahrenheit and Reaumur, mostly Kelvin and Rankine were about a century away still), the proposals were widely accepted and we still use 0 for freezing and 100 for boiling today. (b) red (d) the N- and S-poles exchange position when the direction of current through the solenoid is reversed. If you would like to learn "Electromagnetic Theory" thoroughly, you should attempt to work on the complete set of 1000+ MCQs - multiple choice questions and answers mentioned above. (c) green It is denoted by M. Electric Flux. The role of science is very important in our everyday life. (b) Flemings left hand rule (c) same at all points As mentioned, voltage is defined as the electric potential difference per unit charge between two points in an electric field. 10 Lines on Essay on Wonders of Science in English. The magnetic field is the region around a magnetic material or moving electric charge within which the force of magnetism acts. The closeness or density of the field lines is directly proportional to the strength of the field. Swing check valves are usually installed in conjunction with gate valves because they provide relatively free flow. (b) use of fuse Magnetic field can be depicted in several ways. Magnetic field lines indicate the magnetic fields direction. (c) chemical energy to mechanical energy The corona effect will occur in high voltage systems unless sufficient care is taken to limit the strength of the surrounding electric field. This way of systematic learning will prepare you easily for Electromagnetic Theory exams, contests, online tests, quizzes, MCQ-tests, viva-voce, interviews, and certifications. Magnetic field around a straight conductor Assertion : On bringing a positively charged rod near the uncharged conductor, the conductor gets attracted towards the rod. Question 4. The fact that they intersected at a whole number is purely coincidental. In static and balanced power system 6. 7. (b) elliptical in shape (a) E 1 > E 2 (b) E 1 < E 2 (c) E 2 = rE 1 (d) E 2 = E 1 /r. 1. Joining the points shows the magnetic field lines. Requested URL: byjus.com/ncert-solutions-class-7-science/chapter-14-electric-current-and-its-effects/, User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36. Choose the incorrect statements from the following regarding magnetic lines of field. (c) the pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet (d) found to increase from one end to the other. The seating surface is placed at a slight angle to permit easier opening at lower pressures, more positive sealing, and less shock when closing under higher pressures. (a) mechanical energy to electrical energy Different Control Valve Flow Characteristics. The tangent drawn to the magnetic field lines gives the direction of the magnetic field. Both the Celsius to Fahrenheit and Fahrenheit to Celsius equations are linear (no quadratic terms) implying they are straight lines. The magnitude of this induced EMF depends upon the rate of change of flux 5. Question 7. field lines are drawn over the horizontal plane ABCD, the lines are Right hand thumb rule (d) In India, the AC changes direction after every \(\frac{1}{50}\) second. Web Anders Celsius actually defined his temperature scale exactly the opposite way that everybody thinks he did. 4. (d) Left hand thumb rule. (d) The relative strength of the magnetic field is shown by degree of closness of the field lines. Colour of insulation of live wire, Answer: 2011-2022 Sanfoundry. Closure is accomplished by the weight of the check mechanism, by back pressure, by a spring, or by a combination of these means. Intrinsic Impedance and Propagation Constant, Advanced Electromagnetic Theory Questions, Instrumentation Engineering MCQ PDF Download, 1000 Data Structures & Algorithms II MCQs, 50k Electronics & Communication Engg MCQs. The pressure of the fluid passing through the system opens the valve, while any reversal of flow will close the valve. The disk seals against the seat, which is integral with the body. Question 15. Closure is accomplished by the weight of the check mechanism, by back pressure, by a spring, or by a combination of these means. By convention the magnetic field lines emerge from pole and merge at pole. PLCs play a crucial role in the field of automation, using forming part of a larger SCADA system. Check valves are designed to prevent the reversal of flow in a piping system. He originally defined 0 as the boiling point and 100 as the freezing point. Question 3. The compass needle should be placed on a piece of paper near the magnet. (c) Right hand thumb rule Corona discharge can cause an audible hissing or cracking noise as it ionizes the air around the conductors. The pressure of the fluid passing through the system opens the valve, while any reversal of flow will close the valve. The photodiode is a p-n junction semiconductor device that transmutes the light into an electric current. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. Magnetic field lines do not cross one another. 1000+ Electromagnetic Theory MCQ PDF arranged chapterwise! Why Restriction Orifice is some distance from Blowdown valve ? 6. Answer (b) Though the net charge on the conductor is still zero but due to induction negatively charged region is nearer to the rod as Electricity and electric and electronic equipment plays a vital role in our everyday life. The section contains multiple choice questions and answers on types of polarization, plane waves in free space, dielectrics as well as good conductor, brewster angle and snell law. (b) No two field lines can cross each other Magnetic flux refers to the number of magnetic field lines passing through a closed surface. Inside the magnet, the direction of the magnetic field lines is from the south pole to the north pole. Question 5. (b) electrical energy to mechanical energy The N-pole of the resultant magnet is on the faces close to 2. -. (g) current always flows in one direction. Here the magnetic field lines never cross each other and never stop. Question 11. In India the potential difference between live wire and neutral wire is You should practice these MCQs for 1 hour daily for 2-3 months. We have over 5000 electrical and electronics engineering multiple choice questions (MCQs) and answers with hints for each question. 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As a result of the EUs General Data Protection Regulation (GDPR). Question 12. The section contains questions and answers on transmission line primary,secondary parameters with equations, power and return loss,standing waves, reflection and transmission coefficients. You can unsubscribe at any time. Magnetic field lines around a straight conductor forms a pattern of (d) there are momentary galvanometer deflections that die out shortly; the deflection are in opposite directions. Answer: (b) electrical energy to mechanical energy. Let us describe this using equations. 2. (c) straight lines parallel to each other (Due to earths magnetic field) (c) The difference between the direct and alternating currents is that the current always flows in one direction, whereas the alternating current reverses its direction periodically. Magnetic field lines form a closed-loop. Check the below NCERT MCQ Questions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current with Answers Pdf free download. The safety device which is used to protect the circuit from short circuiting and overloading 4. According to new CBSE Exam Pattern, MCQ Questions for Class 10 Science pdf Carries 20 Marks. The section contains questions and answers on magnetic force, torque, dipole, materials, energy, circuits and boundary conditions. Initially the key is not inserted. (b) minimum in the middle Put your understanding of this concept to test by answering a few MCQs. Down (d) concentric circles near the point O but of elliptical shapes as we go away from it. Swing check valves are available in either Y-pattern or straight body design.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'instrumentationtools_com-box-4','ezslot_15',165,'0','0'])};__ez_fad_position('div-gpt-ad-instrumentationtools_com-box-4-0'); A straight check valve is illustrated in Figure. Coulomb Law; Short and Open Circuit Lines; 12. You can unsubscribe at any time. (a) earthing Types & Advantages, Zero Suppression and Zero Elevation Calculations. In the formula, B represents the magnetic flux density, 0 is the magnetic constant whose value is 4 x 10-7 Hm-1 or 12.57 x 10-7 Hm-1, N represents the number of turns, and I is the current flowing through the solenoid. At any point on the field, field lines have both direction and magnitude. We promise not to spam you. Therefore, magnetic field lines are represented by a vector. The current as seen from points A and B (in the plane of paper and on the axis of the coil) is anticlockwise and clockwise respectively. Among the following statements, the incorrect statement is A coil of many circular turns of insulated copper wire wrapped closely in shape of a cylinder is called a . Reasons, Solutions. Concentric circles This distance is measured in terms of armature slots or armature conductors that come between two adjacent pole centers. Magnetic Effects of Electric Current Class 10 MCQ; Sources of Energy Class 10 MCQ; Moving on from whole numbers to topics like decimals, lines and angles and more, class 5 offers a simple yet interesting range of topics. The device which convert electrical energy into mechanical energy Electric flux refers to the number of electric field lines passing through a closed surface. AC generator converts energy into energy. Lenzs law of electromagnetic induction states that the direction of this induced current will be such that the magnetic field created by the induced current opposes the initial changing magnetic field which produced it. (b) B (a) concentric circles Where, E is the electric field. Choose the incorrect statement We promise not to spam you. F is a force. Composition disks are usually recommended for services where dirt or other particles may be present in the fluid, where noise is objectionable, or where positive shutoff is required. Field lines have both direction and magnitude at any point on the field. As there is a change in resistance of strain gauge, the bridge gets unbalanced and producing an indication at the voltmeter. Q is the charge. Click Start Quiz to begin! When the gauge is unstrained, the bridge is balanced, and voltmeter shows zero value. atmatm24365atm Answer. If we solve for this solution or plot both the lines, we see that the intersect at (-40,-40). The direction of this current flow can be Why Thermocouple Reference Junction Compensation Required ? Answer: (c) Field lines can cross each other. Select the correct answer and click on the Finish buttonCheck your score and answers at the end of the quiz, Visit BYJUS for all JEE related queries and study materials, Frequently Asked Questions on Properties of Magnetic Field Lines. The magnetic field is a field produced by the magnet or electric charges in motion. They are recommended for lines having low velocity flow and should not be used on lines with pulsating flow when the continual flapping or pounding would be destructive to the seating elements. It is a visual tool used to visualize the direction and the strength of the magnetic field. Magnetic field in a long solenoid is homogeneous and its strength doesnt depend Feedforward Control with Dynamic Compensation, 4-20mA Junction Box versus Fieldbus (FF) Junction Box, What is a Feedback Control System? Siemens AG (Berlin and Munich) is a global technology powerhouse that has stood for engineering excellence, innovation, quality, reliability and internationality for more than 170 years.Active around the world, the company focuses on intelligent infrastructure for buildings and distributed energy systems and on automation and digitalization in the process and The MCQ Test offered by Embibe is curated based on revised CBSE Class Books, paper patterns and syllabus for the year 2021. A swing check valve allows full, unobstructed flow and automatically closes as pressure decreases. For a current in a long straight solenoid, N- and S-poles are created at the two ends. NCERT Solutions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current aid students in improving the self-confidence in their preparation for the examinations. (c) straight line Waveguides The sequence impedance varies with the type of power system components under consideration:-. The section contains MCQs on gradient, curl, line, surface and volume integrals, theorems like-stokes, greens, gauss divergence. Across: It is the best reference material to build a foundation for Science subjects for both board and other entrance Pole pitch is defined as the peripheral distance between the center of two adjacent poles in a DC machine. (d) white. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Solenoid Valves Energized or De-energized State ? About Our Coalition. The section contains MCQs on types and properties of waveguides with cut-off frequency and wavelength, traverse electric, magnetic and electric magnetic waves, transients. Prop 30 is supported by a coalition including CalFire Firefighters, the American Lung Association, environmental organizations, electrical workers and businesses that want to improve Californias air quality by fighting and preventing wildfires and reducing air pollution from vehicles. They denote the direction of the magnetic field. (a) the deflection in the galvanometer remains zero throughout. This law states that when a conductor moves in a magnetic field it cuts magnetic lines of force, which induces an electromagnetic force (EMF) in the conductor.. (b) The right-hand thumb rule is used to find the direction of magnetic fields due to current carrying conductors. Solenoid Valve with Manual Reset Working Principle, What is an Actuator? In previous fault calculation, Z 1, Z 2 and Z 0 are positive, negative and zero sequence impedance respectively. Check the direction in which the compass needle points and mark the direction. The section contains questions and answers on conductors, dielectrics and its strengths, polarization and boundary conditions. The insulation colour of earth wire is In the magnetic field, the force exerted by a magnet can be detected using a compass or any other magnet. Therefore, magnetic field lines are vectors. PLCs play a crucial role in the field of automation, using forming part of a larger SCADA system. The electric flux density at any point in the field is defined as the number of lines of force crossing perpendicularly a unit surface area at that point. Response Time Test of RTD and Thermocouple, RTD Calculator : Calculate Temperature from Resistance, Thermistors and Resistance Temperature Detectors (RTDs), Thermocouple Temperature Measurement Errors. (a) concentric circles (d) mechanical energy to light energy. The site owner may have set restrictions that prevent you from accessing the site. The electric field strength at P 1 is E 1 and that at P 2 is E 2 If distance between P 1, P 2 is r, then which of the following statement is true? The magnetic field lines point from B to A. Move the compass needle to different positions and mark the directions. Its SI unit is Weber and in CGS is Maxwell. (c) 280 V Another way is the use of field lines. (d) at a point located in the plane of the paper, on the south side of the wire. Be the first to get exclusive content straight to your email. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Testing thermocouples and RTDs using Multi-function Calibrators, Thermowell Insertion and Immersion Length, Difference Between RTD, Thermocouple and Thermistor, Stability and Uniformity of Temperature Bath. Magnetic Field Unit and Measurement Magnetic fields are represented using magnetic field lines. We have Provided Magnetic Effects of Electric Current Class 10 Science MCQs Questions with Answers to help students understand the concept very well. Question 10. (b) the strong magnetic field produced inside the solenoid can be used to magnetise a piece of magnetic material like soft iron, when placed inside the coil In this circuit, R 1 and R 3 are the ratio arms equal to each other, and R 2 is the rheostat arm has a value equal to the strain gage resistance. Turbulence and pressure drop within the valve are very low. C = (C * 9/5) + 32C (C * 9/5) = 32-4/5 * C = 32C = -32 * 5/4C = -40, F = (F * 9/5) + 32F (F * 9/5) = 32-4/5 * F = 32F = -32 * 5/4F = -40. The most important safety method used for protecting home appliances from short circuiting or overloading is by The total number of lines of force is considered equal to the charge of the object in coulombs. Different Types of Actuators, Difference Between Linear Actuator and Rotary Actuator, How to Protect Pumps from Cavitation? (b) there is a momentary deflection in the galvanometer but it dies out shortly and there is no effect when the keys is removed. Therefore, magnetic field lines are represented by a vector. Electromagnetic induction Flemings Left-Hand rule is mainly applicable to electric motors and Flemings Right-Hand rule is mainly applicable to electric generators. (d) use of electric meter. Simple Conversions ofCelsius and Fahrenheit Temperature Scales, F to C : Deduct 32, then multiply by 5, then divide by 9, C to F : Multiply by 9, then divide by 5, then add 32, C to F :Add 40, multiply by 9/5, then subtract 40, F to C : Add 40, multiply by 5/9, then subtract 40. 6. RD Sharma Solutions , RS Aggarwal Solutions and NCERT Solutions. Answer: (c) straight lines parallel to each other (Due to earths magnetic field). Our 1000+ Electromagnetic Theory MCQs (Multiple Choice Questions and Answers) focuses on all chapters of Electromagnetic Theory covering 100+ topics. Electric flux is defined as the total number of lines of force emanated from a charged object. (a) Flemings right-hand rule is a simple rule to know the direction of induced current. An electric field is also described as the electric force per unit charge. So the temperature when both the Celsius and Fahrenheit scales are the same is -40 degrees. Magnetic field lines appear to emerge or start from the north pole and merge or terminate at the south pole. Its SI unit is voltmeter. (a) A They have different slopes and are non-parallel with a single solution. magnetic field in intensity as well as density and also magnostatic energy and its properties. In either style, the disk and hinge are suspended from the body by means of a hinge pin. 3. (b) magnetic field lines are closed curves Question 1. Inside the magnet, the direction of the magnetic field lines is from the south pole to the north pole. This is common in high voltage electric power transmission lines. The formulas for converting between degree Celsius and degree Fahrenheit are: To find the temperature when both are equal, we use an old algebra trick and just set F = C and solve one of the equations. The section contains multiple choice questions and answers on coulomb and gauss law with applications, electric field-intensity, density, potential and electrostatic energy and proprties. (d) square shape. In the manufacturing industry, there will be a need for reprogramming due to the change in the nature of production. Magnetic field lines appear to emerge or begin at the north pole and terminate at the south pole. Magnetic Effects of Electric Current Class 10 MCQs Questions with Answers. Question 2. Test Your Knowledge On Properties Of Magnetic Field Lines! (a) 240 V The section contains MCQs on maxwell law 1, 2, 3, 4 and also maxwell law in time static fields as well as time varying fields. Fuse, Down: Optimized production requires extensive data analysis - of machines, production lines, entire factories. You can refer to NCERT Solutions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. Magnetic field lines never intersect with each other. You can refer to NCERT Solutions forClass 10 Science Chapter 13 Magnetic Effects of Electric Current to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. At the centre of current carrying loop the magnetic field appears to be a , Across Answer: (a) E 1 > E 2 (a) the field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid The section contains multiple choice questions and answers on laws like-biot savart, faraday, lenz, ampere and maxwell laws. (b) concentric ellipse Principle of electric generator The section contains multiple choice questions and answers on advanced, tricky, tough electromagnetic theory. NCERT Solutions for Class 10 Science Chapter 13 CBSE Free PDF Download. Question 13. A circular loop placed in a plane perpendicular to the plane of paper carries a current when the keys is ON. Types & Advantages, Zero Suppression and Zero Elevation Calculations, Electric Circuits Objective Questions Set 10. () Magnetic field lines are closed curves ResearchGate is a network dedicated to science and research. A swing check valve is normally recommended for use in systems employing gate valves because of the low pressure drop across the valve. Reason : Both the Celsius to Fahrenheit and Fahrenheit to Celsius equations are linear (no quadratic terms) implying they are straight lines. Electric motor is a device which converts Field lines have both direction and magnitude at any point on the field. This type of check valve usually has replaceable seat rings. Exercise Questions. (a) the direction of magnetic field at a point is taken to be the direction in which the north pole of a magnetic compass needle points Faradays law states that a current will be induced in a conductor which is exposed to a changing magnetic field. The direction of induced current is given by Then the key is inserted and later removed. (a) blue Select the incorrect statement The section contains MCQs on laplace and poisson equations, resistances, capacitances and images. We are not permitting internet traffic to Byjus website from countries within European Union at this time. Then The general types of check valves are swing, tilting-disk, piston, butterfly, and stop. 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