Question

A closed coil consists of 500 turns has area `4 cm^2` and a resistance of `50 Omega`. The coil is kept with its plane perpendicular to a uniform magnetic field of `0.2 Wb/m^2`. Calculate the amount charge flowing through the coil if it is rotated through `180^@`

Answer 1

`N=500` , `A=4cm^(2)=4xxI0^(-4)m^(2)` , `R=-50Omega` , `B=0.2T`
`Box`
`phi_(I)=NBAcos0=NAB`
`phi_(2)=NBAcosI80^(@)=-NBA`
`Deltaq=(Deltaphi)/(R)=(2NBA)/(R)`
`=(2xx500xx0.2xx4xxI0^(-4))/(50)`
`=I6xxI0^(-4)C`