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 Higher the self-inductance of a coil longer the delay in establishing steady current through it lesser its weber-turns greater the flux produced by it lower the e.m.f. induced 2 / 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 self-inductance capacitance mutual inductance series aiding inductance 3 / 20 Mutually inductance between two magnetically-coupled coils depends on all of the above cross-sectional area of their common core permeability of the core the number of their turns 4 / 20 Air-core coils are practically free from none of the above hysteresis losses eddy current losses both and 5 / 20 An open coil has zero resistance and inductance zero resistance and high inductance infinite resistance and zero inductance infinite resistance and normal inductance 6 / 20 The magnitude of the induced e.m.f. in a conductor depends on the flux density of the magnetic field amount of flux cut rate of change of flux-linkages amount of flux linkages 7 / 20 In case of an inductance current is proportional to neither nor magnetic field voltage across the inductance both and 8 / 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 perpendicular to the magnetic flux lies in a magnetic field cuts magnetic flux 9 / 20 Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be quadrupled halved unaffected doubled 10 / 20 Which of the following inductor will have the least eddy current losses ? Laminated iron core Iron core Air core Powdered iron core 11 / 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 increase remain the same decrease initially increase and then decrease 12 / 20 Which circuit element(s) will oppose the change in circuit current ? Inductance only Resistance only Inductance and capacitance Capacitance only 13 / 20 A coil is wound on iron core which carries current I. The self-induced voltage in the coil is not affected by variation in coil current change of number of turns of coil variation in voltage to the coil the resistance of magnetic path 14 / 20 Which of the following circuit elements will oppose the change in circuit current ? All of the above Resistance Capacitance Inductance 15 / 20 Which of the following is not a unit of inductance ? Coulomb/volt ampere Henry All of the above Volt second per ampere 16 / 20 The inductance of a coil will increase under all the following conditions except when more length for the same number of turns is provided when permeability of the core increases when more area for each turn is provided when the number of turns of the coil increase 17 / 20 Which of the following circuit element stores energy in the electromagnetic field ? Condenser Inductance Resistance Variable resistor 18 / 20 A laminated iron core has reduced eddy-current losses because the laminations are stacked vertically the laminations are insulated from each other more wire can be used with less D.C. resistance in coil the magnetic flux is concentrated in the air gap of the core 19 / 20 A crack in the magnetic path of an inductor will result in unchanged inductance reduced inductance zero inductance increased inductance 20 / 20 The law that the induced e.m.f. and current always oppose the cause producing them is due to Lenz Faraday Coulomb Newton 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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