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