single circular loop of wire filled with a uniform magnetic

yekidota

1. The problem statement, all variables and given/known data
The figure to the right shows a single circular loop of wire
filled with a uniform magnetic field pointing into the page
The radius of the loop is R = 1.75 cm. The magnitude
of the magnetic field in the loop is changing
according to B(t) = B0 exp{-t / 2.15sec}
(a) what is the value of B0 if at t = 0.25 sec
the magnitude of the induced emf in
the loop is 1.00 V?
(b) what is the magnitude of the induced electric field inside
the loop at a distance


2. Relevant equations
Φ=BA
E=dΦB/dt


3. The attempt at a solution

Φ=BA = (B0^-t/2.15)π1.75^2

E=dΦB/dt =-AdB/dt=-(π1.75^2)((d(B0^(-0.25/2.15)))/dt

yekidota

am i using the right formula?
I wanted to know if im on the right track for a)