Question

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? moving the magnet slower using more loops of wire in the coil using the north pole of the magnet setting the magnet down in the solenoid

Explanation:

According to Faraday's law of electromagnetic - induction, the induced emf (and thus the induced current) is proportional to the rate of change of magnetic flux and the number of loops in the coil. Moving the magnet slower reduces the rate of change of magnetic flux, using the north - pole instead of the south - pole doesn't necessarily increase the current as it depends on the direction of the magnetic field and the coil's orientation, and setting the magnet down stops the change in magnetic flux. Using more loops of wire in the coil increases the induced emf and current.

Answer:

using more loops of wire in the coil