Question

A free electron and a free proton are placed between two oppositely charged parallel plates. Both are closer to the positive plate than the negative plate.

Which of the following statements is true?

1. The force on the proton is greater than the force on the electron.
2. The potential energy of the proton is greater than that of the electron.
3. The potential energy of the proton and the electron is the same.

Options

• I only

• II only

• III and I only

• II and I only

Answer 1

II only

Explanation:

∵ F_p = F_e  ∵ F = qE

E = same

'q' = same

Now, P𝜀 = q V(r)

(P. 𝜀)p > (P. 𝜀)e