Julia produces a 2 mA current by moving the south pole of a bar magnet into a solenoid. The solenoid contains 150 loops of wire.Which change should Julia make to generate a larger current?

A changing magnetic field induces current in the solenoid, and adding more wire loops increases the induced voltage and current. So Julia should use more loops of wire in the coil. Moving the magnet slower would reduce the rate of magnetic-field change, while setting it down would stop the change and the induced current.

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