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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
- In a transistor the collector current is always less than the emitter current
- A ball rolls off the top of stair way with a horizontal velocity of magnitude 1.8 m/s
- A coil has an area of 0.05 m² and it has 800 turns. It is placed perpendicularly
- If in an experiment for determination of velocity of sound by resonance tube
- An open knife edge of mass 200g is dropped from height 5m on a cardboard
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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