Question

how does the magnetic force vary with distance?
a. as distance increases, the magnetic force changes direction.
b. as distance increases, the magnetic force stays the same.
c. as distance increases, the magnetic force increases.
d. as distance increases, the magnetic force decreases.

Explanation:

The magnetic force is an inverse - square law force. As the distance between magnetic sources increases, the strength of the magnetic field and thus the magnetic force between them decreases.

Answer:

D. As distance increases, the magnetic force decreases.