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 element stores energy in the electromagnetic field ? Inductance Variable resistor Condenser Resistance 2 / 20 The law that the induced e.m.f. and current always oppose the cause producing them is due to Coulomb Newton Lenz Faraday 3 / 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 perpendicular to the magnetic flux lies in a magnetic field 4 / 20 Air-core coils are practically free from none of the above hysteresis losses both and eddy current losses 5 / 20 Higher the self-inductance of a coil lesser its weber-turns lower the e.m.f. induced longer the delay in establishing steady current through it greater the flux produced by it 6 / 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 amount of flux linkages flux density of the magnetic field 7 / 20 Which circuit element(s) will oppose the change in circuit current ? Resistance only Capacitance only Inductance and capacitance Inductance only 8 / 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 more area for each turn is provided when the number of turns of the coil increase 9 / 20 An open coil has zero resistance and inductance zero resistance and high inductance infinite resistance and zero inductance infinite resistance and normal inductance 10 / 20 Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be unaffected halved quadrupled doubled 11 / 20 A crack in the magnetic path of an inductor will result in reduced inductance zero inductance unchanged inductance increased inductance 12 / 20 Mutually inductance between two magnetically-coupled coils depends on the number of their turns permeability of the core all of the above cross-sectional area of their common core 13 / 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 series aiding inductance mutual inductance capacitance 14 / 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 decrease increase initially increase and then decrease 15 / 20 Which of the following inductor will have the least eddy current losses ? Powdered iron core Air core Laminated iron core Iron core 16 / 20 Which of the following circuit elements will oppose the change in circuit current ? Resistance Capacitance Inductance All of the above 17 / 20 In case of an inductance current is proportional to both and voltage across the inductance magnetic field neither nor 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 A laminated iron core has reduced eddy-current losses because the laminations are insulated from each other the magnetic flux is concentrated in the air gap of the core the laminations are stacked vertically more wire can be used with less D.C. resistance in coil 20 / 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 change of number of turns of coil the resistance of magnetic path variation in coil current कृपया सही सूचना भरें ताकि सर्टिफिकेट ईमेल पर भेजा जा सकें। NameEmailPhone NumberDistrictSchool/Coaching Name Your score is LinkedIn Facebook Twitter VKontakte 0% Restart quiz आपको यह क्विज अच्छी लगी तो 5 स्टार रेटिंग जरुर दें । Send feedback
