Question
A circular loop of wire with radius 0.0450 m and resistance 0.154 R is in a region of spatially uniform magnetic. The magnetic field is directed out of the plane. The magnetic field has an initial value of 7.89 T and is decreasing at a rate of -0.630 T/s.
What is the rate at which electrical energy is being dissipated by the resistance of the loop?
I know that the rate is equal to P = I^2R
So I have to find the induced emf to find the current I.
I tried to find the induced emf using Faraday's Law and got 4.01*10^-3 V. But I don't know what to do with the initial value of the magnetic field 7.89 T.
What is the rate at which electrical energy is being dissipated by the resistance of the loop?
I know that the rate is equal to P = I^2R
So I have to find the induced emf to find the current I.
I tried to find the induced emf using Faraday's Law and got 4.01*10^-3 V. But I don't know what to do with the initial value of the magnetic field 7.89 T.