MEDIUM
12th West Bengal Board
IMPORTANT
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Select the correct statement from the following. 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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Important Questions on Electromagnetic Induction

HARD
12th West Bengal Board
IMPORTANT

Two different coils have self inductance L1=8 mH and L2=2 mH, respectively. The current in one coil is increased at a constant rate and the current in the second coil is also increased at the same constant rate. At a certain instant of time, the power given to the two coils is same. At that time, the current, the induced voltage and the energy stored in the first coil are i1, V1 and W1, respectively. The corresponding values for the second coil, at the same instant, are i2, V2 and W2, respectively. Now, select the incorrect option.

MEDIUM
12th West Bengal Board
IMPORTANT
A thin circular ring of area A is held perpendicular to a uniform magnetic field of induction B. A small cut is made in the ring and a galvanometer is connected across the ends such that the total resistance of the circuit is R. When the ring is suddenly squeezed to zero area, the charge flowing through the galvanometer is
MEDIUM
12th West Bengal Board
IMPORTANT
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. What happens to loop B?
MEDIUM
12th West Bengal Board
IMPORTANT
Relate the mutual inductance of the system is proportional to the length of the concentric square. Where a small square loop of wire of side l is placed inside a large square loop of wire of side L(L>>l) The loops are co-planar and their centres coincide.
MEDIUM
12th West Bengal Board
IMPORTANT
A conducting square loop of side L and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B, constant in time and space, pointing perpendicular to and into the plane of the loop exists everywhere. The current induced in the loop is

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MEDIUM
12th West Bengal Board
IMPORTANT
A thin semicircular conducting ring of R is falling with its plane vertical in a horizontal magnetic induction B, Fig. 9.73. At the position MNQ the speed of the ring is v and the potential difference developed across the ring is 

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MEDIUM
12th West Bengal Board
IMPORTANT
A uniform but time-varying magnetic field B(t) exists in a circular region of radius a and is directed into the plane of the paper a shown, Fig. 9.74 The magnitude of the induced electric field at point P at a distance r from the centre of the circular region

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EASY
12th West Bengal Board
IMPORTANT
A metallic square loop ABCD is moving in its own plane with velocity v in a uniform magnetic field perpendicular to its plane as shown. Electric field is induced

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