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 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 2 / 20 The unit of relative permeability is henry it is dimensionless henry/sq. m henry/metre 3 / 20 Tesla is a unit of inductance flux density flux field strength 4 / 20 A permeable substance is one which is a strong magnet which is a bad conductor which is a good conductor through which the magnetic lines of force can pass very easily 5 / 20 Which of the following is a vector quantity ? Relative permeability Magnetic field intensity Magnetic potential Flux density 6 / 20 Gilbert is a unit of permittivity electromotive force conductance magnetomotive force 7 / 20 Which of the following is the unit of magnetic flux density ? lumens weber tesla none of the above 8 / 20 Magnetising steel is normals difficult because it has high permeability it has high specific gravity it has low permeability it corrodes easily 9 / 20 In the left hand rule forefinger always represents current direction of force on the conductor magnetic field voltage 10 / 20 The ratio of intensity of magnetisation to the magnetisation force is known as relative permeability none of the above susceptibility flux density 11 / 20 Air gap has_______eluctance as compared to iron or steel path zero little lower higher 12 / 20 The use of permanent magnets is. not made in loud-speakers transformers energy meters magnetoes 13 / 20 Ferrites are materials. paramagnetic none of the above diamagnetic ferromagnetic 14 / 20 Ferrites are a sub-group of ferri-magnetic materials ferro-magnetic materials paramagnetic materials non-magnetic materials 15 / 20 Which of the following is a ferromagnetic material ? Copper Tungsten Aluminium Nickel 16 / 20 A magnetic field exists around moving charges copper iron aluminium 17 / 20 The main constituent of permalloy is cobalt tungsten nickel chromium 18 / 20 Paramagnetic materials have relative permeability slightly more than unity equal to unity slightly less than unity equal to that ferromagnetic mate rials 19 / 20 The left hand rule correlates to current magnetic field and direction of force on a conductor current induced e.m.f. and direction of force on a conductor magnetic field electric field and direction of force on a conductor self induction mutual induction and direction of force on a conductor 20 / 20 The materials having low retentivity are suitable for making weak magnets permanent magnets temporary magnets none 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
