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 Which circuit element(s) will oppose the change in circuit current ? Capacitance only Inductance and capacitance Resistance only Inductance only 2 / 20 Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be quadrupled halved doubled unaffected 3 / 20 The law that the induced e.m.f. and current always oppose the cause producing them is due to Coulomb Lenz Newton Faraday 4 / 20 In case of an inductance current is proportional to neither nor both and magnetic field voltage across the inductance 5 / 20 Which of the following circuit element stores energy in the electromagnetic field ? Variable resistor Inductance Condenser Resistance 6 / 20 Higher the self-inductance of a coil lesser its weber-turns longer the delay in establishing steady current through it greater the flux produced by it lower the e.m.f. induced 7 / 20 The inductance of a coil will increase under all the following conditions except 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 when the number of turns of the coil increase 8 / 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 9 / 20 Which of the following is not a unit of inductance ? Henry Coulomb/volt ampere All of the above Volt second per ampere 10 / 20 Which of the following circuit elements will oppose the change in circuit current ? All of the above Inductance Capacitance Resistance 11 / 20 An open coil has zero resistance and high inductance infinite resistance and normal inductance infinite resistance and zero inductance zero resistance and inductance 12 / 20 Mutually inductance between two magnetically-coupled coils depends on all of the above permeability of the core cross-sectional area of their common core the number of their turns 13 / 20 Air-core coils are practically free from eddy current losses none of the above hysteresis losses both and 14 / 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 the resistance of magnetic path change of number of turns of coil variation in coil current 15 / 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 16 / 20 A crack in the magnetic path of an inductor will result in zero inductance unchanged inductance reduced inductance increased inductance 17 / 20 A laminated iron core has reduced eddy-current losses because the laminations are insulated from each other the laminations are stacked vertically more wire can be used with less D.C. resistance in coil the magnetic flux is concentrated in the air gap of the core 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 initially increase and then decrease decrease increase remain the same 19 / 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 self-inductance capacitance series aiding inductance 20 / 20 Which of the following inductor will have the least eddy current losses ? Powdered iron core Iron core Air core Laminated iron core कृपया सही सूचना भरें ताकि सर्टिफिकेट ईमेल पर भेजा जा सकें। NameEmailPhone NumberDistrictSchool/Coaching Name Your score is LinkedIn Facebook VKontakte 0% Restart quiz आपको यह क्विज अच्छी लगी तो 5 स्टार रेटिंग जरुर दें । Send feedback
