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An electric dipole is placed at an angle...

An electric dipole is placed at an angle of `60^(@)` with an electric field of intensity `10^(5)NC^(-1)`. It experiences a torque equal to `8sqrt(3)Nm`. If the dipole lengt is 2cm then the charge on the dipole is ………………. C.

A

`-8xx10^(3)`

B

`8.54xx10^(-4)`

C

`8xx10^(-3)`

D

`0.85xx10^(-6)`

Text Solution

Verified by Experts

The correct Answer is:
C
`tau=PEsintheta=q(2a)Esintheta`,
`therefore q=(r)/((2a)Esintheta)=(8sqrt(3)Nm)/(2xx10^(-2)xx10^(5)xxsin60)=8xx10^(-3)`
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