Question

which of the following actions would increase the amount of force applied to the wheels of the toy car?
a. replacing the magnet with a stronger magnet
b. decreasing the number of loops in the electromagnets coil
c. decreasing the electric current running through the electromagnet
d. increasing the distance between the magnets poles and the electromagnet

Explanation:

The force between a magnet and an electromagnet can be increased by using a stronger magnet. More loops, higher current, and a closer - proximity also increase the force. Decreasing loops, current, or increasing distance reduces the force.

Answer:

A. replacing the magnet with a stronger magnet