Question

Two identical charged particles having charge 2×10 ^-8 C each are joined by an insulating string of length 1m and system is kept on a smooth horizontal table. Tension in the string is. the options are...... a) 10.36 ×10^-6 N. b) 3.6×10^-5 N... c) 3.6 ×10^-6 N. d) 0.36 ×10^-4 N. please give me the answer with full explanation.​

Answer 1

Answer:

The answer is, c) 3.6 ×10^-6 N.

Explanation:

Let's start with what is given,

Charge of particle, q1= q2= 2×10^-8 C

Distance between the particles, r= 1m

Value of k= 8.98×10^9 Nm^2/C^2

We know, tension in the string= the force acting on the string

Force,

F=kq1q2/r^2

=(8.98×10^9)(2×10^-8)^2/1

=3.6×10^-6 N

So, the tension acting on the string is 3.6×10^-6 N.