NEET-XII-Physics
qstns with ansrs year:2022
- #45A big circular coil of `` 1000 `` turns and average radius `` 10 \,m `` is rotating about its horizontal diameter at `` 2\, rad\, s ^{-1} `` . If the vertical component of earth's magnetic field at that place is `` 2 \times 10^{-5} T `` and electrical resistance of the coil is `` 12.56\, \Omega `` , then the maximum induced current in the coil will be:
(A) `` 2 \,A ``
(B) `` 0.25\, A ``
(C) `` 1.5\, A ``
(D) `` 1\, A ``digAnsr: DAns : `` i _{\max }=\frac{ E _{\max }}{ R }=\frac{ NBA \omega }{ R } ``
`` i _{\max }=\frac{1000 \times 2 \times 10^{-5} \times \pi\left(10^{2}\right) \times 2}{12.56} ``
`` i _{\max }=1 A ``