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