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An Electric dipole with dipole moment 4 ...

An Electric dipole with dipole moment `4 xx 10^9cm` is aligned at an angle `30^@` with the direction of uniform electric field of magnitude `5 xx 10^4 NC^(-1)` , Calculate the magnitude of the torque acting on the electric dipole.

Text Solution

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`P= 4 xx 10^(-9)cm`
`theta=30^(@)`
`E= 5 xx 10^(4) NC^(-1)`
`pi=pE sin theta`
`pi=4 xx 10^(-9)cm xx 5 xx 10^(4)NC_(1) xx 30^(@)`
`pi = 20 xx 10^(-5) xx 1/2Nm`
`pi = 1 xx 10^(-4)Nm`
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