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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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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- what is the electric potential at a distance of 9cm from 3nC?
- For an ideal gas of diatomic molecules
- Six molecules have speeds 2 units, 5 units, 3 units, 6 units, 3 units and 5 units
- Two simple harmonic motions of angular frequency 100 and 1000 rad s⁻¹ have the same
- We get Balmer series when electron comes from
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