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 An open coil has infinite resistance and zero inductance zero resistance and high inductance zero resistance and inductance infinite resistance and normal inductance 2 / 20 A coil is wound on iron core which carries current I. The self-induced voltage in the coil is not affected by change of number of turns of coil the resistance of magnetic path variation in voltage to the coil variation in coil current 3 / 20 A crack in the magnetic path of an inductor will result in unchanged inductance zero inductance increased inductance reduced inductance 4 / 20 Which of the following is not a unit of inductance ? Volt second per ampere Coulomb/volt ampere All of the above Henry 5 / 20 Mutually inductance between two magnetically-coupled coils depends on the number of their turns all of the above permeability of the core cross-sectional area of their common core 6 / 20 Which of the following inductor will have the least eddy current losses ? Iron core Powdered iron core Laminated iron core Air core 7 / 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 increase decrease initially increase and then decrease 8 / 20 Higher the self-inductance of a coil greater the flux produced by it lower the e.m.f. induced longer the delay in establishing steady current through it lesser its weber-turns 9 / 20 Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be unaffected halved doubled quadrupled 10 / 20 The law that the induced e.m.f. and current always oppose the cause producing them is due to Newton Coulomb Faraday Lenz 11 / 20 Which of the following circuit element stores energy in the electromagnetic field ? Resistance Variable resistor Inductance Condenser 12 / 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 capacitance series aiding inductance mutual inductance self-inductance 13 / 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 14 / 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 15 / 20 Which circuit element(s) will oppose the change in circuit current ? Resistance only Capacitance only Inductance only Inductance and capacitance 16 / 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 17 / 20 Which of the following circuit elements will oppose the change in circuit current ? Capacitance All of the above Inductance Resistance 18 / 20 Air-core coils are practically free from eddy current losses none of the above hysteresis losses both and 19 / 20 In case of an inductance current is proportional to neither nor both and magnetic field voltage across the inductance 20 / 20 The inductance of a coil will increase under all the following conditions except when more area for each turn is provided when permeability of the core increases when more length for the same number of turns is provided when the number of turns of the coil increase 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
