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