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 circuit elements will oppose the change in circuit current ? Resistance All of the above Capacitance Inductance 2 / 20 As per Faraday’s laws of electromagnetic induction an e.m.f. is induced in a conductor whenever it moves parallel to the direction of the magnetic field lies perpendicular to the magnetic flux cuts magnetic flux lies in a magnetic field 3 / 20 A crack in the magnetic path of an inductor will result in reduced inductance unchanged inductance zero inductance increased inductance 4 / 20 Which of the following circuit element stores energy in the electromagnetic field ? Variable resistor Inductance Condenser Resistance 5 / 20 Higher the self-inductance of a coil longer the delay in establishing steady current through it greater the flux produced by it lesser its weber-turns lower the e.m.f. induced 6 / 20 Mutually inductance between two magnetically-coupled coils depends on permeability of the core cross-sectional area of their common core all of the above the number of their turns 7 / 20 Which circuit element(s) will oppose the change in circuit current ? Capacitance only Resistance only Inductance and capacitance Inductance only 8 / 20 A laminated iron core has reduced eddy-current losses because the laminations are stacked vertically 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 9 / 20 Which of the following inductor will have the least eddy current losses ? Air core Laminated iron core Powdered iron core Iron core 10 / 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 11 / 20 In case of an inductance current is proportional to neither nor voltage across the inductance both and magnetic field 12 / 20 The law that the induced e.m.f. and current always oppose the cause producing them is due to Newton Coulomb Faraday Lenz 13 / 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 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 The magnitude of the induced e.m.f. in a conductor depends on the rate of change of flux-linkages amount of flux cut flux density of the magnetic field amount of flux linkages 16 / 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 initially increase and then decrease decrease increase 17 / 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 series aiding inductance capacitance 18 / 20 Which of the following is not a unit of inductance ? Volt second per ampere Coulomb/volt ampere All of the above Henry 19 / 20 Air-core coils are practically free from none of the above hysteresis losses both and eddy current losses 20 / 20 An open coil has zero resistance and high inductance zero resistance and inductance infinite resistance and zero inductance infinite resistance and normal inductance 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
