MEDIUM
12th West Bengal Board
IMPORTANT
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Magnetic field at the centre of a coil in the form of a square of side carrying current of is -
(a)
(b)
(c)
(d)

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Important Questions on Electromagnetism
EASY
12th West Bengal Board
IMPORTANT

EASY
12th West Bengal Board
IMPORTANT
and are two concentric coils of centre and carry currents and are shown in Fig. If the ratio of their radii and the ratio of the flux densities at O due to and is then value of is-

MEDIUM
12th West Bengal Board
IMPORTANT

HARD
12th West Bengal Board
IMPORTANT

MEDIUM
12th West Bengal Board
IMPORTANT

MEDIUM
12th West Bengal Board
IMPORTANT

EASY
12th West Bengal Board
IMPORTANT

MEDIUM
12th West Bengal Board
IMPORTANT
