ELECTROMAGNETIC INDUCTION ONLINE TEST
CLASS-12, SUBJECT-PHYSICS
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The unit of magnetic flux is
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A circular wire loop of radius r is placed in a region of magnetic field B such that the plane of the loop makes an angle 9 with the direction of B. In which of the following conditions will no emf be induced in the loop:
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The induced emf produced when a magnet is inserted into a coil does not depend upon:
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Which one of the following can produce maximum induced emf?
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Lenz’s law is a consequence of the law of conservation of:
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Two identical circular loops of metal wire are lying on a table without touching each other. Loop-A carries a current which increases with time. In response, the loop-B:
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A magnet is allowed to fall through a metal ring. During the fall
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A coil having 500 square loops each of side 10 cm is placed normal to a magnetic field which increases at a rate of lT/s. The induced emf in volt is:
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A metal rod moves at a constant velocity in a direction perpendicular to its length.A constant, uniform magnetic field exists in space in a direction perpendicular to the rod as well as its velocity. Select the correct statement from the following:
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The unit of inductance is:
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What is the self-inductance of a coil which produces 5 V when the current changes from 3 A to 2 A in one millisecond?
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When the number of turns and the length of the solenoid are doubled keeping the area of cross-section same, the inductance:
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Energy in a current-carrying coil is stored in the form of
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Eddy currents are produced when:
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The law of electromagnetic induction has been used in the construction of:
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A coil of inductance 8.4 mH and resistance 6 ohm is connected to a 12 V battery. The current in the coil is 1.0 A at approximately the time:
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A transformer is used
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When the current through a solenoid increases at a constant rate, the induced current
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Two identical coaxial circular loops carry a current / each, circulating in the same direction. If the loops approach each other, will you observe that:
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According to Faraday’s law, the total charge induced in a conductor that is moved in a magnetic field depends upon:
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