The most likely reason the comb is able to repel the balloon is that, the balloon and the comb have the same electrical charge.
The question is incomplete, the complete question is;
One student rubs a balloon against his hair several times. Another student passes a comb through her hair several times. The students place the comb near the balloon and observe that the comb repels the balloon. Which is the most likely reason the comb is able to repel the balloon?
A.The balloon has a positive charge and the comb is neutral.
B. The balloon and the comb have the same electrical charge.
C. The balloon has a negative charge and the comb is neutral.
D. The balloon and the comb have opposite electrical charges
When the student rubs a balloon against his hair several times or another student passes a comb through her hair several times, static charges are built up on the balloon and the comb.
One of the ways by which a neutral object can be charged is by friction. That is, rubbing it against another object repeatedly.
The fact that when the students place the comb near the balloon and observe that the comb repels the balloon means that both the comb and the balloon acquired the same kind of charge after friction.
Therefore, the balloon and the comb have the same electrical charge.
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