Two unlike charges of magnitude $q$ are separated by a distance $2d$. The potential at a point midway between them is:
- Azero
- B$\dfrac{1}{4\pi\varepsilon_0}$
- C$\dfrac{1}{4\pi\varepsilon_0}\cdot\dfrac{q}{d}$
- D$\dfrac{1}{4\pi\varepsilon_0}\cdot\dfrac{2q}{d^2}$
✓ Correct answer: A
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