Which of the following is an effect of the magnetic force
a.a positive and negative charge attract each other
b.a north pole and south pole repel each other
c.a north pole and south pole attract each other
d.a positive and negative charge repel each other

C

Explanation:

A north pole and South pole attract eachother

C. A north pole and south pole attract each other

Explanation:

The magnetic force refers to an attraction or repulsion between electrically charged particles. Electromagnetic force is one of the four fundamental forces of nature, and it is caused by the motion of charges. An example of this can be seen in a magnet. A magnet has both a north pole and a south pole. Opposite poles are attracted to each other, while the same poles are repelled by each other.

"Work"

This relates to the equation

Work done = force x distance

And work done, by definition, is the measure of energy transfer when a force displaces an object.