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

Answer 1

Answer: (A)

$180^{o},\frac{1}{4\pi\varepsilon_{0}}\frac{Q^{2}}{(2L)^{2}}$

Answer 2

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

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