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An 820 turn wire coil of resistance 24.0 Ω is placed around a 12500 turn solenoid, 7.60 cm long, as shown in the figure below. Both coil and solenoid have cross-sectional areas of 1.60×10−4 m2. (a) How long does it take the solenoid current to reach 63.2% of its maximum value? ms (b) Determine the average back emf caused by the self-inductance of the solenoid during this interval. V (c) Determine the average rate of change in magnetic flux through the coil during this interval. V (d) Determine the magnitude of the average induced current in the coil. A

An 820 turn wire coil of resistance 24.0 Ω is placed around a 12500 turn solenoid, 7.60 cm long, as shown in the figure below. Both coil and solenoid have cross-sectional areas of 1.60×10−4 m2. (a) How long does it take the solenoid current to reach 63.2% of its maximum value? ms (b) Determine the average back emf caused by the self-inductance of the solenoid during this interval. V (c) Determine the average rate of change in magnetic flux through the coil during this interval. V (d) Determine the magnitude of the average induced current in the coil. A

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An 820 turn wire coil of resistance 24.0 Ω is placed around a 12500 turn solenoid, 7.60 cm long, as shown in the figure below. Both coil and solenoid have cross-sectional areas of 1.60 × 10 − 4 m 2 . (a) How long does it take the solenoid current to reach 63.2 % of its maximum value? ms (b) Determine the average back emf caused by the self-inductance of the solenoid during this interval. ◻ V (c) Determine the average rate of change in magnetic flux through the coil during this interval. ◻ V (d) Determine the magnitude of the average induced current in the coil. ◻ A

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