Two charged particles having charge `2.0xx 10^(-8)C` each are joined by an insulating string of length 1 m and the system is kept on a smooth horizontal table. Find the tension in the string.

Explanation

Here `q_(1) = q_(2) = 2xx10^(-8) C, r = 1m`
Tension in the string is the force of repulision (F) between the two charges.
According to Coulomb's law,
`F = (q_(1) q_(2))/(4pi in_(0) r^(2)) = ((9xx10^(9) (2xx10^(-8)) (2xx10^(-8)))/(1^(2)))`
`3.6xx10^(-6)N`