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