A student plans an investigation to determine whether an object has a positive charge, a negative charge, or is electrically neutral. Which statements describe procedures and the expected results that the student should follow?

Multiple select question.
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A)
Bring a pith ball that has a negative charge near the object. If the ball is repelled, the object is electrically neutral.

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B)
Bring a pith ball that has a positive charge near the object. If the ball is repelled, the object has a positive charge.

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C)
Bring a pith ball that has a negative charge near the object. If the ball is attracted, the object has a positive charge.

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D)
Bring a pith ball that has a positive charge near the object. If the ball is attracted, the object is electrically neutral.

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E)
Bring a pith ball that has a negative charge near the object. If the ball is repelled, the object is electrically neutral.

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F)
Bring a pith ball that has a positive charge near the object. If the ball is attracted, the object has a negative charge.

1 answer

To determine whether an object has a positive charge, a negative charge, or is electrically neutral, the student can follow these procedures and interpret the expected results. The correct statements from the options provided are:

C) Bring a pith ball that has a negative charge near the object. If the ball is attracted, the object has a positive charge.

F) Bring a pith ball that has a positive charge near the object. If the ball is attracted, the object has a negative charge.

Explanation:

  1. Like charges repel, and opposite charges attract. Therefore:
    • If a negatively charged pith ball is attracted to the object, the object must have a positive charge.
    • Conversely, if a positively charged pith ball is attracted to the object, the object must have a negative charge.

The other statements (A, B, D, E) are incorrect as they either misinterpret the nature of electric charge interactions or incorrectly predict the expected results.

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