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प्रश्न
In which orientation, a dipole placed in a uniform electric field is in (i) stable, (ii) unstable equilibrium?
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उत्तर
A dipole placed in a uniform electric filed is in
Stable equilibrium when the electric field is directed along the direction of the dipole i.e., when `vecE` is parallel to`vecp`.
Unstable equilibrium when the electric filed is directed at an angle of 180 degrees with the direction of the dipole, i.e., when `vecE` is anti-parallel to`vecp`.
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संबंधित प्रश्न
An electric dipole of dipole moment`vecp` consists of point charges +q and −q separated by a distance 2a apart. Deduce the expression for the electric field `vecE` due to the dipole at a distance x from the centre of the dipole on its axial line in terms of the dipole moment `vecp`. Hence show that in the limit x>> a, `vecE->2vecp"/"(4piepsilon_0x^3)`
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