For each statement select P for Positive, N for Negative, or Z for Zero charge (

Question

For each statement select P for Positive, N for Negative, or Z for Zero charge (Neutral). (If the first answer is positive, the second negative, and the third neutral (zero net charge), enter PNZ. Do not enter spaces)

A) A positively charged rod is brought close to a neutral isolated conductor, but it does not touch. The conductor is then grounded while the rod is kept close. If the rod is first taken away, and THEN the ground connection is removed, what is the final charge of the conductor?

B) A negatively charged rod is brought close to a neutral isolated conductor, but it does not touch. The rod is then removed. What is the final charge of the conductor?

C) A positively charged rod is brought close to a neutral isolated conductor, but it does not touch. The conductor is then grounded while the rod is kept close. If the ground connection is first broken, and THEN the rod is removed, what is the final charge of the conductor?

Explanation / Answer

(A) as +ve charrged rod is brought closes, conductor will become -vely charged.

but as rod is taken away first then excess -ve charge will go to ground as it is still connected to ground.

so final charge is zero.

Z

(B) as -vely charged rod doesn't change and conductor is not connected to ground, there is no way from which excess charge can come in conductor.

(as rod is brough closer then part closer to rod will become +vely charged and other part will -ve charged such that net charge is zero )

Z

(C) conductor is connected to ground and as +vely charged rod is brought closer then excess -ve charge (electrons) will be possessed by rod from ground.

now ground connecetion is cut then there is no way for excess charge to flow out.

hence conductor will become negatively charged.

N

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