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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
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A body is moving with velocity 30 m/s towards east. After 10 seconds its velocity
- An electron of mass m and a photon have same energy E. The ratio of de-Broglie
- A juggler maintains four balls in motion,making each of them to rise
- The threshold frequency for a metallic surface corresponds to an energy of 6.2 eV,
- At place on earth, the vertical component of earth’s magnetic field is √3 times
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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