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Maximum torque on a dipole in electric f...

Maximum torque on a dipole in electric field is given by:

A

`pE`

B

`(P)/( E )`

C

`(E )/(P )`

D

`vecP . vecE `

Text Solution

Verified by Experts

The correct Answer is:
A
`tau_(max) = pE sin 90^(@)` = pE
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Knowledge Check

  • Torque acting on a dipole in electric field is given by:

    A
    PE
    B
    PE sin `theta`
    C
    PE cos `theta`
    D
    0

  • Torque acting on a dipole placed in electric field is minimum when angle between vecp and vec(E) is:

    A
    `0^(@)`
    B
    `90^(@)`
    C
    `45^(@)`
    D
    `270^(@)`

  • An electric dipole moment p is placed in an electric field of intensity 'E' . The dipole acquires a position such that the axis of the dipole makes an angle theta with the direction of the field. Assuming that the potential energy of the dipole to be zero when theta= 90^(@) , the torque and the potential energy of the dipole will respectively be

    A
    `pE cos theta, - pE sin theta`
    B
    `pE sin theta, - pE cos theta`
    C
    `pE sin theta, - 2pE cos theta`
    D
    `pE sin theta, 2pE cos theta`

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