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Two identical metal spheres charged with...

Two identical metal spheres charged with `+12muCand-8muC` are kept at certain distance in air . They are brought into contact and then kept at the same distance . The ratio of the magnitudes of electrostatic forces between them before and after contact is

A

`24 : 1`

B

`4 : 1`

C

`12 : 1`

D

`8 : 1`

Text Solution

Verified by Experts

The correct Answer is:
a
Bofore contact

`thereforeF_(2)=+(1)/(4piepsilon_(0))*((2xx10^(-6)xx2xx10^(-6)))/(d^(2))therefore(F_(1))/(F_(2))=(96)/(4)=(24)/(1)`
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