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