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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.
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Topics: Electrostatics
(146)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A body is rolling down an inclined plane.If KE of rotation is 40% of KE in a translatory
- A gas is suddenly expanded such that its final volume becomes 3 times
- If a body travels half the distance with velocity v1 and the next half with velocity v2
- Which of the following physical quantities has neither dimensions nor unit
- A 6 volt battery is connected to the terminals of a three metre long wire of uniform
Topics: Electrostatics (146)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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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