Question

A current carrying infinity long wire is kept along the diameter of a circular wire loop, without touching it, the correct statement(s) is(are)

• A. The emf induced in the loop is zero if the current is constant.
• B. The emf induced in the loop is finite if the current is constant.
• C. The emf induced in the loop is zero if the current decreases at a steady rate.
• D. The emf induced in the loop is in finite if the current decreases at a steady rate.

Answer 1

Answer: (A), (C)

The correct options are
A The emf induced in the loop is zero if the current is constant.
C The emf induced in the loop is zero if the current decreases at a steady rate.

emf induced in coil is $0$ if the current is constant because there is no changing flux

$\epsilon =-N\frac{d\varphi }{dt}$

Emf induced in the loop is finite if the current decreases at a steady state.