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A solenoid is marked 650 turns. The mean flux per turn is found to be 6.80 × 10-4 Wb when a current of 3.20 A flows through the solenoid. If a self-induced emf of 0.0800 V is desired, determine the magnitude of the current change rate (di/dt) through the solenoid.

A solenoid is marked 650 turns. The mean flux per turn is found to be 6.80 × 10^-4 Wb when a current of 3.20 A flows through the solenoid. If a self-induced emf of 0.0800 V is desired, determine the magnitude of the current change rate (di/dt) through the solenoid.