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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
- The total energy of a particle executing SHM is 80 J
- An avarage induced e.m.f. of 1 V appears in a coil when the current in it is changed
- All components of the electromagnetic spectrum in vacuum have the same
- Maximum velocity of the photoelectron emitted by a metal is 1.8×10⁶ ms⁻¹.
- If the cold junction of a thermo-couple is kept at 0⁰C and the hot junction is kept
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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