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An electric dipole of moment ‘p’ is placed in an electric field of intensity ‘E’. The dipole acquires a position such that the axis of the dipole makes an angle θ with the direction of the field. Assuming that the potential energy of the dipole to be zero when = 90⁰, the torque and the potential energy of the dipole will respectively be:
Options
(a) p E sin θ, – p E cos θ
(b) p E sin θ, – 2 p E cos θ
(c) p E sin θ, p E cos θ
(d) p E cos θ, – p E sin θ
Correct Answer:
p E sin θ, – p E cos θ
Explanation:
The torque on the dipole is given as ? = p E sin θ. The potential energy of otghe dipole in the electric field is given as U = – p E cos θ.
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Topics: Electrostatics
(146)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Bragg’s law for X-rays is
- A parallel plate capacitor with air between the plates has a capacitance of 9 pF.
- The work function of metals is in the range of 2 eV to 5 eV.
- The range of voltmeter is 10V and its internal resistance is 50Ω.
- The ratio of speed of an electron in ground state in Bohr’s first orbit of hydrogen atom
Topics: Electrostatics (146)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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