Question

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

• A. Zero
• B. $\frac{1}{4 \pi \varepsilon_{0}} \frac{q}{d}$
• C. $\frac{3}{2 \pi \varepsilon_{0}} \frac{q}{d}$
• D. $\frac{5}{4 \pi \varepsilon_{0}} \frac{q}{d}$

Answer 1

Answer: (A)

Due to unlike charges potential at a point midway between them is zero
$V_{\text {net }}=\frac{K q}{4 \pi \varepsilon_{0} \frac{5 d}{2}}+\frac{(-K q)}{4 \pi \varepsilon_{0} \frac{5 d}{2}}$
$V_{\text{net}}=$ Zero