The component of the external magnetic field along the central axis of a turn circular coil of radius cm decreases from t to t in s. if the resistance of the coil is ω, what is the magnitude of the induced current in the coil?

  I =  Δ(N*B*A) / R*Δt

                   and

               I= ΔФ / R*Δt

Explanation:

what is electromagnetic induction?

electromagnetic induction is a mechanism where current is induced in a coil or loop. To be specific Faraday's law of electromagnetic induction says that induced EMF is proportional to the induced current or emf.

FORMULA

I= ΔФ / R*Δt

BY EXPANDING THE FORMULA WE GET

ΔФ= Δ(N*B*A)  

by putting the value in equation we get:

I =  Δ(N*B*A) / R*Δt

where A is area of circular coil π*r²

DATA

N is number of turns in the coil

r  is radius of the circular coil

ΔB is  magnetic field

Δt is time

R is resistance of coil