A N2 = BlS-turn wire coil of resistance 24.0 I! is placed on top of a 6.10-cm-long, N1 = 13100-turn solenoid, as in the figure below. Both coil and solenoid have cross-sectional areas of 1.24 x 10'4 m2. 24.0 0 N2 turns 60.0 V (D (a) How long does it take the solenoid current to reach 0.632 times its maximum value? 31.4 v ms (b) Determine the average back emf caused by the self-inductance of the solenoid during this interval. The magnetic eld produced by the solenoid at the location of the coil is one-half as strong as the eld at the center of the solenoid. (Enter the magnitude only.) 66.24 X Your response differs from the correct answer by more than 100%. V (c) Determine the average rate of change in magnetic flux through each turn of the coil during the stated interval. 0.0029 X Your response differs from the correct answer by more than 100%. V (d) Find the magnitude of the average induced current in the coil. 93.5 x Your response differs from the correct answer by more than 100%. mA