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