-4 AN2 = 810-turn wire coil of resistance 24.0 is placed on top of a 6.20-cm-long, N = 12600-turn solenoid, as in the figure below. Both coil and solenoid have cross-sectional areas of 1.36 x 107 m. 60.0 V 14.0 ww + 24.0 N turns N turns (a) How long does it take the solenoid current to reach 0.632 times its maximum value? ms (b) 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. (Enter the magnitude only.) V (c) Determine the average rate of change in magnetic flux through each turn of the coil during the stated interval. V (d) Find the magnitude of the average induced current in the coil. mA