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 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 2 / 20 Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be halved doubled quadrupled unaffected 3 / 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 4 / 20 The magnitude of the induced e.m.f. in a conductor depends on the amount of flux linkages flux density of the magnetic field amount of flux cut rate of change of flux-linkages 5 / 20 In case of an inductance current is proportional to neither nor voltage across the inductance both and magnetic field 6 / 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 7 / 20 Higher the self-inductance of a coil longer the delay in establishing steady current through it greater the flux produced by it lower the e.m.f. induced lesser its weber-turns 8 / 20 Which of the following circuit elements will oppose the change in circuit current ? All of the above Capacitance Resistance Inductance 9 / 20 Which of the following is not a unit of inductance ? All of the above Coulomb/volt ampere Henry Volt second per ampere 10 / 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 variation in coil current the resistance of magnetic path change of number of turns of coil 11 / 20 Which of the following inductor will have the least eddy current losses ? Powdered iron core Iron core Air core Laminated iron core 12 / 20 An open coil has infinite resistance and normal inductance zero resistance and inductance infinite resistance and zero inductance zero resistance and high inductance 13 / 20 Air-core coils are practically free from eddy current losses both and none of the above hysteresis losses 14 / 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 cuts magnetic flux lies in a magnetic field lies perpendicular to the magnetic flux 15 / 20 Which circuit element(s) will oppose the change in circuit current ? Inductance and capacitance Inductance only Resistance only Capacitance only 16 / 20 A crack in the magnetic path of an inductor will result in reduced inductance unchanged inductance zero inductance increased inductance 17 / 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 stacked vertically the laminations are insulated from each other 18 / 20 The law that the induced e.m.f. and current always oppose the cause producing them is due to Coulomb Lenz Newton Faraday 19 / 20 The inductance of a coil will increase under all the following conditions except when the number of turns of the coil increase 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 20 / 20 Which of the following circuit element stores energy in the electromagnetic field ? Inductance Resistance Variable resistor Condenser 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
