1. A positive charged rod is held near, but does not touch a neutral electroscope. The charge on the knob becomes(adsbygoogle = window.adsbygoogle || []).push({});

1) positive and the leaves become positive 2) positive and the leaves become negative.

3) - and the leaves become + 4) - and the leaves become -.

I chose 1), but it's wrong. I am not really familiar with electroscope and how they work.

2. There are two positive charged spheres, A and B (A is at the left, B is at the right), 3 meters apart. There is a point x left to the A. If sphere A is moved toward sphere B, the electirc field intensity at point x will

1) decrease 2) increase 3) remain the same

I chose 2) since E=V/d, so when d decreases, E increases. But the answer is 1), so I am wondering if the voltage changes as well? so in general, If there is a change in distance between two charges, will the voltage or potential difference change? if not, then what will affect the potential difference?

Thanks.

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# Homework Help: Will the voltage or potential difference change?

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