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An electric dipole consists of two oppos...

An electric dipole consists of two opposite charges , each of magnitude `1.0 mu C ` separated by a distance of 2.0 cm . The dipole is placed in an external field of `10^(5) "NC"^(-1)` . The maximum torque on the dipole is :

A

`0.2 xx10^(-3)`N-m

B

`1xx10^(-3)`N-m

C

`2xx10^(-3)`N-m

D

`4xx10^(-3)`N-m

Text Solution

Verified by Experts

The correct Answer is:
C
`tau = pE sin theta " " ( :. theta = 90^(@) , tau to tau _(max))`
` :. tau = pE`
`(10^(-6)) (2xx10^(-2)) (10^(5))`
` = 2xx10^(-1) ` Nm
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