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 increase initially increase and then decrease decrease remain the same 2 / 20 In case of an inductance current is proportional to magnetic field voltage across the inductance both and neither nor 3 / 20 Which circuit element(s) will oppose the change in circuit current ? Resistance only Inductance only Inductance and capacitance Capacitance only 4 / 20 Which of the following circuit elements will oppose the change in circuit current ? Capacitance All of the above Inductance Resistance 5 / 20 Which of the following is not a unit of inductance ? Coulomb/volt ampere Henry Volt second per ampere All of the above 6 / 20 Which of the following circuit element stores energy in the electromagnetic field ? Inductance Resistance Condenser Variable resistor 7 / 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 series aiding inductance capacitance self-inductance mutual inductance 8 / 20 Mutually inductance between two magnetically-coupled coils depends on the number of their turns all of the above cross-sectional area of their common core permeability of the core 9 / 20 An open coil has infinite resistance and normal inductance zero resistance and inductance infinite resistance and zero inductance zero resistance and high inductance 10 / 20 Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be unaffected doubled halved quadrupled 11 / 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 12 / 20 The magnitude of the induced e.m.f. in a conductor depends on the flux density of the magnetic field amount of flux linkages rate of change of flux-linkages amount of flux cut 13 / 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 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 coil current variation in voltage to the coil the resistance of magnetic path change of number of turns of coil 15 / 20 The law that the induced e.m.f. and current always oppose the cause producing them is due to Lenz Coulomb Faraday Newton 16 / 20 Which of the following inductor will have the least eddy current losses ? Air core Powdered iron core Laminated iron core Iron core 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 Air-core coils are practically free from none of the above eddy current losses hysteresis losses both and 19 / 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 permeability of the core increases when the number of turns of the coil increase when more area for each turn is provided 20 / 20 A crack in the magnetic path of an inductor will result in reduced inductance zero inductance unchanged inductance increased inductance 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
