Electromagnetic Induction Quiz Set 1 Posted on June 11, 2020September 8, 2020 by Surendra 0% 0 Created by Surendra Electromagnetic Induction Quiz in English Set 1 All Important Question Answers for Electrician Related Exams 1 / 20 Which of the following inductor will have the least eddy current losses ? Powdered iron core Iron core Laminated iron core Air core 2 / 20 A crack in the magnetic path of an inductor will result in unchanged inductance zero inductance increased inductance reduced inductance 3 / 20 The magnitude of the induced e.m.f. in a conductor depends on the flux density of the magnetic field rate of change of flux-linkages amount of flux linkages amount of flux cut 4 / 20 The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as capacitance mutual inductance self-inductance series aiding inductance 5 / 20 As per Faraday’s laws of electromagnetic induction an e.m.f. is induced in a conductor whenever it moves parallel to the direction of the magnetic field lies in a magnetic field cuts magnetic flux lies perpendicular to the magnetic flux 6 / 20 In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will decrease remain the same increase initially increase and then decrease 7 / 20 Which of the following is not a unit of inductance ? Henry Coulomb/volt ampere All of the above Volt second per ampere 8 / 20 Higher the self-inductance of a coil greater the flux produced by it lesser its weber-turns longer the delay in establishing steady current through it lower the e.m.f. induced 9 / 20 Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be unaffected doubled halved quadrupled 10 / 20 The law that the induced e.m.f. and current always oppose the cause producing them is due to Faraday Lenz Newton Coulomb 11 / 20 Which circuit element(s) will oppose the change in circuit current ? Capacitance only Resistance only Inductance only Inductance and capacitance 12 / 20 An open coil has infinite resistance and normal inductance zero resistance and inductance zero resistance and high inductance infinite resistance and zero inductance 13 / 20 Which of the following circuit element stores energy in the electromagnetic field ? Inductance Variable resistor Condenser Resistance 14 / 20 Air-core coils are practically free from none of the above both and eddy current losses hysteresis losses 15 / 20 In case of an inductance current is proportional to both and voltage across the inductance magnetic field neither nor 16 / 20 The inductance of a coil will increase under all the following conditions except when permeability of the core increases when the number of turns of the coil increase when more area for each turn is provided when more length for the same number of turns is provided 17 / 20 Which of the following circuit elements will oppose the change in circuit current ? Resistance Capacitance All of the above Inductance 18 / 20 Mutually inductance between two magnetically-coupled coils depends on permeability of the core cross-sectional area of their common core the number of their turns all of the above 19 / 20 A laminated iron core has reduced eddy-current losses because more wire can be used with less D.C. resistance in coil the laminations are stacked vertically the magnetic flux is concentrated in the air gap of the core the laminations are insulated from each other 20 / 20 A coil is wound on iron core which carries current I. The self-induced voltage in the coil is not affected by the resistance of magnetic path variation in voltage to the coil change of number of turns of coil variation in coil current कृपया सही सूचना भरें ताकि सर्टिफिकेट ईमेल पर भेजा जा सकें। Your score is LinkedIn Facebook Twitter 0% Restart quiz आपको यह क्विज अच्छी लगी तो 5 स्टार रेटिंग जरुर दें । Send feedback
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