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In which orientation, a dipole placed in...

In which orientation, a dipole placed in a uniform electric field is in (i) stable (ii) unstable equilibrium ?

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A dipole placed in a uniform electric field is in a stable equilibrium when angle between `vecp` and `vec E` is `0^@`.
(ii) For unstable equilibrium the angle between `vec p and vec E` should be `pi` radian.
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Knowledge Check

  • An electric dipole placed in a non-uniform electric field experiences

    A
    Only force but not torque
    B
    Only torque but not force
    C
    No torque and no net force
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    Both torque and net force

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    B
    only a torque
    C
    both force and torque
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    neither force nor torque

  • An electric dipole placed in a non-uniform electric field experience in general

    A
    A force but not a torque
    B
    A torque but not a force
    C
    A force anda torque
    D
    Neither a force nor a torque

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