Question

Two unlike charge of magnitude $q$ are separated by a distance $5d$. The potential at a point midway between them

• A. Zero
• B. $\frac{1}{4\pi {\epsilon }_0}\frac{q}{d}$
• C. $\frac{3}{2\pi {\epsilon }_0}\frac{q}{d}$
• D. $\frac{5}{4\pi {\epsilon }_0}\frac{q}{d}$

Answer 1

Answer: (A)

Due to unlike charges potential at a point midway between them is zero
$V_{\text{net }}=\frac{Kq}{4\pi {\epsilon }_0\frac{5d}{2}}+\frac{(-Kq)}{4\pi {\epsilon }_0\frac{5d}{2}}$
$V_{\text{net}}=$ Zero