Two small spheres each having equal positive charge Q Coulomb) on each are suspended by two insulating strings of equal length L (metre) from a rigid hook (shown) in figure). The whole set up is taken into satellite where there is 'no gravity. The two balls are now held by electrostatic forces in horizontal position, the tension in each string is then

Options

A. `Q^(2)/16pi epsilon_(0) L^(2)`
B. `Q^(2)/8pi epsilon_(0) L^(2)`
C. `Q^(2)/4pi epsilon_(0) L^(2)`
D. `Q^(2)/2pi epsilon_(0) L^(2)`

Answer

(a)

Explanation

Tension in each string , T = F = `1/4 pi epsilon_(0) Q^(2)/(2L)^(2) = Q^(2)/16 pi epsilon_(0)L^(2)`