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