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 initially increase and then decrease remain the same increase decrease 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 mutual inductance series aiding inductance capacitance 3 / 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 4 / 20 Which of the following circuit elements will oppose the change in circuit current ? Inductance Capacitance All of the above Resistance 5 / 20 Which of the following is not a unit of inductance ? All of the above Coulomb/volt ampere Henry Volt second per ampere 6 / 20 As per Faraday’s laws of electromagnetic induction an e.m.f. is induced in a conductor whenever it cuts magnetic flux moves parallel to the direction of the magnetic field lies perpendicular to the magnetic flux lies in a magnetic field 7 / 20 Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be doubled quadrupled halved unaffected 8 / 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 the resistance of magnetic path variation in coil current variation in voltage to the coil 9 / 20 Which of the following inductor will have the least eddy current losses ? Laminated iron core Powdered iron core Air core Iron core 10 / 20 The law that the induced e.m.f. and current always oppose the cause producing them is due to Coulomb Lenz Faraday Newton 11 / 20 In case of an inductance current is proportional to magnetic field neither nor both and voltage across the inductance 12 / 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 permeability of the core increases when the number of turns of the coil increase 13 / 20 A crack in the magnetic path of an inductor will result in unchanged inductance reduced inductance zero inductance increased inductance 14 / 20 Higher the self-inductance of a coil lesser its weber-turns greater the flux produced by it lower the e.m.f. induced longer the delay in establishing steady current through it 15 / 20 An open coil has infinite resistance and normal inductance zero resistance and inductance infinite resistance and zero inductance zero resistance and high inductance 16 / 20 A laminated iron core has reduced eddy-current losses because the magnetic flux is concentrated in the air gap of the core more wire can be used with less D.C. resistance in coil the laminations are insulated from each other the laminations are stacked vertically 17 / 20 Which circuit element(s) will oppose the change in circuit current ? Resistance only Inductance only Capacitance only Inductance and capacitance 18 / 20 Air-core coils are practically free from eddy current losses hysteresis losses both and none of the above 19 / 20 Which of the following circuit element stores energy in the electromagnetic field ? Inductance Variable resistor Condenser Resistance 20 / 20 The magnitude of the induced e.m.f. in a conductor depends on the rate of change of flux-linkages amount of flux cut amount of flux linkages flux density of the magnetic field कृपया सही सूचना भरें ताकि सर्टिफिकेट ईमेल पर भेजा जा सकें। NameEmailPhone NumberDistrictSchool/Coaching Name Your score is LinkedIn Facebook Twitter VKontakte 0% Restart quiz आपको यह क्विज अच्छी लगी तो 5 स्टार रेटिंग जरुर दें । Send feedback
