A parallel plate capacitor contains a positively charged plate on the left, and

Question

A parallel plate capacitor contains a positively charged plate on the left, and a negatively charged plate on the right. A proton in between the plates is moving to the right. Which statement is true?

A. The potential energy of the proton is increasing and it is moving to a region having a higher potential.

B. The potential energy of the proton is decreasing and it is moving to a region having a lower potential.

C. The potential energy of the proton is decreasing and it is moving to a region having a higher potential.

D. The potential energy of the proton is increasing and it is moving to a region having a lower potential.

I've seen this question asked with an electron between the plates but I don't understand what would happen to a proton.

Explanation / Answer

correct answer is..................................   B

The potential energy of the proton is decreasing and it is moving to a region having a lower potential

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