Two point charges +q and -q are separated by distance d. The electric potential at a point midway between them is:
Correct answer: B. Zero
- A. kq/d
- B. Zero
- C. 2kq/d
- D. -kq/d
Explanation
Electric potential is a scalar. At the midpoint, distance to each charge is d/2. Potential due to +q is kq/(d/2) = 2kq/d, and due to -q is -2kq/d. Total potential = 2kq/d + (-2kq/d)=0.
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