Acoil 4.20 cm radius, containing 470 turns, is placed in a uniform magnetic field that varies with time according to b=( 1.20×10 −2 t/s )t+(2.55×10 −5 t/s4 )t4. the coil is connected to a 580-ω resistor, and its plane is perpendicular to the magnetic field. you can ignore the resistance of the coil.
a)
find the magnitude of the induced emf in the coil as a function of time.
b)
what is the current in the resistor at time t0 = 4.50 s ?