# A long straight current carrying wire passes normally through the centre of circular loop if the current through the wire increases will there be an induced emf in the loop? justify?

As we know magnetic field lines closed loops magnetic field lines produced by the straight current carrying wire will make Ɵ = 90° with the circular loop.

As we know ϕ = BAcosƟ

If Ɵ = 90°

ϕ = 0

$emf=frac{-dphi }{dt}=0$

There won’t be any induced emf in the closed loop.