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An electric dipole is kept first …

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An electric dipole is kept first to the left and then to the right of a negatively charged infinite plane sheet having a uniform charge density the arrows P1 and P2 show the direction of its electric dipole moment in the two cases identify for each case by the dipole is in stable or unstable equilibrium justify each answer be next the dipole is kept in a similar way as shown near an infinitely long straight wire having uniform negative linear charge density will the dipole be in equilibrium at these two positions justify your answers
  • 2 answers
(a) p1: stable equilibrium
p2: unstable equilibrium
The electric field, on either side, is directed towards the negatively charged sheet and its magnitude is independent of the distance of the field point from the sheet. For position p1, dipole moment and electric field are parallel. For position p2, they are antiparallel.

(b) The dipole will not be in equilibrium in any of the two positions. The electric field due to an infinite straight charged wire is non- uniform (E α 1/r). Hence there will be a net non-zero force on the dipole in each case

Ankit Kumar Singh 6 years, 4 months ago

I don't know
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