By Surendra | June 11, 2020 0 Comment 0% 1 Created by Surendra Electromagnetic Induction Quiz in English Set 1 All Important Question Answers for Electrician Related Exams 1 / 20 In case of an inductance current is proportional to both and voltage across the inductance magnetic field neither nor 2 / 20 Which of the following circuit element stores energy in the electromagnetic field ? Resistance Inductance Condenser Variable resistor 3 / 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 mutual inductance capacitance series aiding inductance self-inductance 4 / 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 coil current variation in voltage to the coil change of number of turns of coil 5 / 20 Air-core coils are practically free from hysteresis losses eddy current losses none of the above both and 6 / 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 lies perpendicular to the magnetic flux cuts magnetic flux 7 / 20 Which circuit element(s) will oppose the change in circuit current ? Resistance only Inductance only Capacitance only Inductance and capacitance 8 / 20 The law that the induced e.m.f. and current always oppose the cause producing them is due to Coulomb Lenz Faraday Newton 9 / 20 Which of the following is not a unit of inductance ? Henry All of the above Volt second per ampere Coulomb/volt ampere 10 / 20 A laminated iron core has reduced eddy-current losses because the laminations are insulated from each other 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 11 / 20 An open coil has zero resistance and high inductance infinite resistance and normal inductance zero resistance and inductance infinite resistance and zero inductance 12 / 20 Mutually inductance between two magnetically-coupled coils depends on the number of their turns cross-sectional area of their common core permeability of the core all of the above 13 / 20 The inductance of a coil will increase under all the following conditions except when the number of turns of the coil increase when more area for each turn is provided when permeability of the core increases when more length for the same number of turns is provided 14 / 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 15 / 20 A crack in the magnetic path of an inductor will result in increased inductance reduced inductance zero inductance unchanged inductance 16 / 20 Higher the self-inductance of a coil lesser its weber-turns lower the e.m.f. induced longer the delay in establishing steady current through it greater the flux produced by it 17 / 20 Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be unaffected halved doubled quadrupled 18 / 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 increase remain the same initially increase and then decrease 19 / 20 Which of the following inductor will have the least eddy current losses ? Powdered iron core Iron core Air core Laminated iron core 20 / 20 Which of the following circuit elements will oppose the change in circuit current ? Capacitance Inductance All of the above Resistance 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
