Question

Two small spheres each having the charge $+Q$ are suspended by insulating threads of length $L$ from a hook. This arrangement is taken in space where there is no gravitational effect, then the angle between the two suspensions and the tension in each will be

• A. $180^{\circ}, \frac{1}{4 \pi \varepsilon_{0}} \frac{Q^{2}}{(2 L)^{2}}$
• B. $90^{\circ}, \frac{1}{4 \pi \varepsilon_{0}} \frac{Q^{2}}{L^{2}}$
• C. $180^{\circ}, \frac{1}{4 \pi \varepsilon_{0}} \frac{Q^{2}}{2 L^{2}}$
• D. $180^{\circ}, \frac{1}{4 \pi \varepsilon_{0}} \frac{Q^{2}}{L^{2}}$

Answer 1

Answer: (A)

The position of the balls in the satellite will become as shown below

Thus angle $\theta=180^{\circ}$ and Force $=\frac{1}{4 \pi \varepsilon_{0}} \cdot \frac{Q^{2}}{(2 L)^{2}}$