3. How does the centripetal force change when the rubber stopper makes a circular motion
with a smaller radius?​

The centripetal force increases.

Explanation:

Centripetal force is given by ; where .

Given these two equations, we can rewrite the formula for centripetal force as:

As shown, radius is in the denominator, thus, a smaller radius would lead to a larger centripetal force.

the higher the current the higher the mag field around it the higher the influence on the compass

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