In figure, a wire perpendicular to a long straight wire is moving parallel to the later with a speed `v = 10 m//s` in the direction of the current flowing in the later. The current is `10 A`. What is the magnitude of the potential difference between the ends of the moving wire?

Answer

A

Explanation

`B=mu_0/(2pi) i/r`
`dV=Bvdr=(mu_0iv)/(2pi) int (dr)/r`
`V=int_(r_1)^(r_2) dV =(mu_0iv)/(2pi) ln (r_2/r_1)`