Question

an electric current is produced using a bar magnet and a solenoid. which changes will cause a decrease in the electric current produced? check all that apply. using more wire loops in the solenoid using fewer wire loops in the solenoid using a stronger magnet moving the solenoid instead of the magnet moving the magnet more slowly

Explanation:

1. Using more wire loops: More loops increase induced EMF (and current), so this is incorrect.
2. Using fewer wire loops: Fewer loops mean less induced EMF, so current decreases. Correct.
3. Using a stronger magnet: A stronger magnet increases the magnetic field change, increasing current. Incorrect.
4. Moving solenoid instead of magnet: The relative motion (change in magnetic flux) is the same, so current isn't decreased. Incorrect.
5. Moving magnet more slowly: Slower motion means a slower change in magnetic flux, reducing induced EMF and current. Correct.

Answer:

B. using fewer wire loops in the solenoid
E. moving the magnet more slowly