Question

An electron and a proton are both released from rest 1 meter from a large stationary negative charge, considering only the force from the large stationary negative charge on the proton and electron.
Which of the following is true?

• A. The magnitude of force is greater on the electron.
• B. The magnitude of force is greater on the proton.
• C. The magnitude of force is the same on both the electron and proton.
• D. The direction of the force, but not the magnitude, is the same on both the electron.

Answer 1

The correct option is C The magnitude of force is the same on both the electron and proton.

The electron has negative charge ,$-e$ and proton has positive charge ,$+e$.

Thus, the force on electron due to the large stationary charge will be repulsive and force on proton due to the large stationary charge will beattractive.

Since both electron and proton released from same distance and they have equal magnitude of charge so the magnitude of force on both the electron and proton will be same.

Thus, option C will be correct.