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 inductor will have the least eddy current losses ? Air core Iron core Laminated iron core Powdered iron core 2 / 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 3 / 20 The inductance of a coil will increase under all the following conditions except when more area for each turn is provided when the number of turns of the coil increase when more length for the same number of turns is provided when permeability of the core increases 4 / 20 Air-core coils are practically free from both and none of the above eddy current losses hysteresis losses 5 / 20 In case of an inductance current is proportional to both and voltage across the inductance magnetic field neither nor 6 / 20 As per Faraday’s laws of electromagnetic induction an e.m.f. is induced in a conductor whenever it lies perpendicular to the magnetic flux moves parallel to the direction of the magnetic field cuts magnetic flux lies in a magnetic field 7 / 20 Which of the following circuit element stores energy in the electromagnetic field ? Condenser Resistance Variable resistor Inductance 8 / 20 Which of the following is not a unit of inductance ? All of the above Volt second per ampere Coulomb/volt ampere Henry 9 / 20 The magnitude of the induced e.m.f. in a conductor depends on the flux density of the magnetic field rate of change of flux-linkages amount of flux cut amount of flux linkages 10 / 20 An open coil has zero resistance and high inductance infinite resistance and zero inductance zero resistance and inductance infinite resistance and normal inductance 11 / 20 A crack in the magnetic path of an inductor will result in reduced inductance increased inductance zero inductance unchanged inductance 12 / 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 initially increase and then decrease increase remain the same 13 / 20 Which of the following circuit elements will oppose the change in circuit current ? Inductance Capacitance All of the above Resistance 14 / 20 The law that the induced e.m.f. and current always oppose the cause producing them is due to Lenz Faraday Newton Coulomb 15 / 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 coil current change of number of turns of coil variation in voltage to the coil 16 / 20 A laminated iron core has reduced eddy-current losses because the laminations are stacked vertically the laminations are insulated from each other the magnetic flux is concentrated in the air gap of the core more wire can be used with less D.C. resistance in coil 17 / 20 Which circuit element(s) will oppose the change in circuit current ? Inductance only Resistance only Capacitance only Inductance and capacitance 18 / 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 19 / 20 Mutually inductance between two magnetically-coupled coils depends on permeability of the core the number of their turns all of the above cross-sectional area of their common core 20 / 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 capacitance mutual inductance series aiding 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
