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Two charged particles having charge 2.0x...

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.

A

`3.6xx10^(4)N`

B

`3.4xx10^(-6)N`

C

`4xx10^(-7)N`

D

`3xx10^(-4)N`

Text Solution

Verified by Experts

The correct Answer is:
A
`q_(1)=q_(2)=2xx10^(-8)C,r=im`
Tension in the string will be equal to the force between the charge .
Accoring to coulomb .s law
`F=(Kq_(1)q_(2))/(r^(2))`
`=(9xx10^(9)xx(2xx10^(-9))^(2))/((1)^(2))`
`=(9xx10^(9)xx4xx10^(-16))/(1)`
`=36xx10^(-7)N=3.6xx10^(-6)N`
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