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