By Surendra | June 11, 2020 0 Comment 0% 5 Created by Surendra Magnetism and Electromagnetism Quiz in English Set 1 All Important Question Answers for Electrician Related Exams 1 / 20 Magnetising steel is normals difficult because it corrodes easily it has high permeability it has low permeability it has high specific gravity 2 / 20 The main constituent of permalloy is nickel cobalt chromium tungsten 3 / 20 Air gap has_______eluctance as compared to iron or steel path higher lower little zero 4 / 20 Ferrites are a sub-group of ferri-magnetic materials non-magnetic materials ferro-magnetic materials paramagnetic materials 5 / 20 A magnetic field exists around copper iron aluminium moving charges 6 / 20 The direction of magnetic lines of force is none of the above from one end of the magnet to another from south pole to north pole from north pole to south pole 7 / 20 The unit of relative permeability is henry/metre henry henry/sq. m it is dimensionless 8 / 20 The left hand rule correlates to current induced e.m.f. and direction of force on a conductor self induction mutual induction and direction of force on a conductor current magnetic field and direction of force on a conductor magnetic field electric field and direction of force on a conductor 9 / 20 Tesla is a unit of inductance flux field strength flux density 10 / 20 Paramagnetic materials have relative permeability slightly more than unity slightly less than unity equal to unity equal to that ferromagnetic mate rials 11 / 20 Which of the following is the unit of magnetic flux density ? tesla lumens weber none of the above 12 / 20 A permeable substance is one which is a bad conductor through which the magnetic lines of force can pass very easily which is a good conductor which is a strong magnet 13 / 20 In the left hand rule forefinger always represents current voltage direction of force on the conductor magnetic field 14 / 20 Which of the following is a vector quantity ? Flux density Magnetic potential Magnetic field intensity Relative permeability 15 / 20 The materials having low retentivity are suitable for making permanent magnets weak magnets none of the above temporary magnets 16 / 20 The ratio of intensity of magnetisation to the magnetisation force is known as susceptibility flux density relative permeability none of the above 17 / 20 Which of the following is a ferromagnetic material ? Tungsten Aluminium Copper Nickel 18 / 20 Gilbert is a unit of conductance magnetomotive force permittivity electromotive force 19 / 20 The use of permanent magnets is. not made in loud-speakers magnetoes energy meters transformers 20 / 20 Ferrites are materials. none of the above paramagnetic ferromagnetic diamagnetic कृपया सही सूचना भरें ताकि सर्टिफिकेट ईमेल पर भेजा जा सकें। NameEmailPhone NumberDistrictSchool/Coaching Name Your score is LinkedIn Facebook Twitter VKontakte 0% Restart quiz आपको यह क्विज अच्छी लगी तो 5 स्टार रेटिंग जरुर दें । Send feedback
