An 800-turn wire coil of resistance 24.0 Ohm is placed on top of a 6.70 cm long solenoid with N1 = 12300 turns, as in the figure below. Both coil and solenoid have cross-sectional areas of 1.01 times 10-4 m2. How long does it take the solenoid current to reach 0.632 times its maximum value? s Determine the average back emf caused by the self-inductance of the solenoid during this interval. The magnetic field produced by the solenoid at the location of the coil is one-half as strong as the field at the center of the solenoid. V Determine the average rate of change in magnetic flux through each turn of the coil during the stated interval. V Find the magnitude of the average induced current in the coil. A
