A square conducting loop is placed in the neighbourhood of a coplaner long straight wire carrying a current i.

Options

A. if `(di)/(dt)=0`, no current is induced in the loop
B. if `(di)/(dt)gt0` , current in the loop is clockwise.
C. if `(di)/(dt)lt0` , current in the loop is anticlockwise.
D. if `(di)/(dt)gt0` , current in the loop is anticlockwise.

Answer

A, D

Explanation

If `(di)/(dt)=0`, it means current is constant, its flux through loop with remain constant. Hence no emf is induced.
If `(di)/(dt)gt0`, current increases so flux increates in loop in inward direction, so induced current should be anticlockwise which produces flux in outward direction.