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A short bar magnet of magnetic moment 0.4 JT⁻¹ is placed in a uniform magnetic field of 0.16 T. The magnet is in stable equlibrium when the potential energy is
Options
(a) -0.064 J
(b) zero
(c) -0.082 J
(d) 0.064 J
Correct Answer:
-0.064 J
Explanation:
For stable equilibrium
U = -MB
= – (0.4)(0.16)
= – 0.064 J
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Topics: Magnetic Effects of Current and Magnetism
(167)
Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Characteristic X-rays are produced due to
- In a potentiometer experiment two cells of e.m.f. E₁ and E₂ are used in series
- Current in a coil changes from 4 A to zero in 0.1 second and the emf induced is 100V
- Which one of the following is not a unit of young’s modulus?
- The motion of a particle along a straight line is described by equation
Topics: Magnetic Effects of Current and Magnetism (167)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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