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25 October, 19:09

A small metal ball hangs from the ceiling by an insulating thread. The ball is attracted to a positively charged rod held nearthe ball. The charge of the ball must be (a) positive. (b) negative. (c) neutral. (d) positive or neutral. (e) negative or neutral.

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  1. 25 October, 19:23
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    (b) negative

    Explanation:

    As objects with opposite charges attract. And we know that the rod held near the ball has positive charge. Then the ball must be negatively charged. Otherwise positive charges would push them further and neutral charges would neither push or pull.
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