Two small metal spheres are connected by a wire, and a negatively charged rod is

Question

Two small metal spheres are connected by a wire, and a negatively charged rod is placed next to the right sphere.

Consider the following student discussion about the potential difference from the left sphere to the right sphere.

Student 1: Since the right sphere is positively charged, the potential is higher there than at the left sphere. The potential difference from left to right is positive.

Student 2: I disagree. The right sphere is closer to the negative rod, so the potential at the right sphere is is lower. The potential difference from left to right is negative.

Student 3: Positive charges want to move to regions of lower potential, but no charges are moving since the system is in equilibrium. Thus the potentital difference is zero.

With which student, if any, do you agree. Explain

Explanation / Answer

student 3 is correct.

here the two spheres are connecetd with wire.

in electrostatuc equilibrium the two spheres must have same potential.

so, potentail diffrence is zero.

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