A coil 3.65 cm radius, containing 540 turns, is placed in a uniform magnetic field that varies with time according to B=( 1.20×10−2 T/s )t+(2.80×10−5 T/s4 )t4. The coil is connected to a 660-Ω resistor, and its plane is perpendicular to the magnetic field. You can ignore the resistance of the coil. Find the magnitude of the induced emf in the coil as a function of time.
Find the magnitude of the induced emf in the coil as a function of time.
Possible Choices
E= 8.63×10−3 V +( 8.06×10−5 V/s3 )t3
E= 2.71×10−2 V +( 6.33×10−5 V/s3 )t3
E= 2.71×10−2 V +( 2.53×10−4 V/s3 )t3
E= 8.63×10−3 V +( 2.53×10−4 V/s3 )t3
What is the current in the resistor at time t0 = 4.90 s ?