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