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