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.

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

Related Questions

  1. The phase difference between the instantaneous velocity and acceleration of a particle
  2. A particle of mass m is projected with a velocity v making an angle of 45°
  3. A mass of 2.0 kg is put on a flat plan attached to a vertical spring fixed on the ground
  4. An atom bomb weighing 1 kg explodes releasing 9×10¹³ J of energy.
  5. A rocket is fired upward from the earth surface such that it creates an acceleration