A large coil of 10 turns has a resistance 2 `Omega`. It is kept in a magnetic field of 0.5 T. if the coil is pulled out of the magnetic field uniformly such that its area coming out of the magnetic field is 200 `cm^(2)//s`, the current induced in it is

Options

A. 5 mA
B. 50 mA
C. 2.5 mA
D. 25 mA

Answer

B

Explanation

`I=(e)/(R)`
`=(n)/(R)(dphi)/(dt)=(nB)/(R)(dA)/(dt)=50mA`.