Navigate

An electric dipole of moment p is lying along a uniform electric field E. The work

An electric dipole of moment p is lying along a uniform electric field E. The work done in rotating the dipole by 90° is

Options

(a) pE
(b) √2 pE
(c) pE / 2
(d) 2pE

Correct Answer:

pE

Explanation:

No explanation available. Be the first to write the explanation for this question by commenting below.

AIPMT2006
admin:

View Comments (1)

  • As Work done =∆U
    ∆pE=U(final) -U(intial)
    As U=-PECOSθ
    Ui=-PECOS0°=-PE
    Uf=-pECOS90°=0 As cos90=0
    So workdone =Uf -Ui
    Workdone=0-(-PE)
    Workdone=PE

Leave a Comment

Related Questions

  1. Two planets at mean distances d₁ and d₂ from the sun have their frequencies n₁ and n₂
  2. A ball is dropped into a well in which the water level is at a depth h below the top
  3. The distance of a geo-stationary satellite from the centre of the earth is nearest to
  4. In Young’s double slit experiment the distance between the slits and the screen
  5. The total radiant energy per unit area, normal to the direction of incidence