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