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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 operation of a nuclear reactor is said to be critical, if the multiplication
- An electron in the hydrogen atom jumps from excited state n to the ground state
- A 1 µA beam of protons with a cross-sectional area of 0.5 sq.mm is moving with a velocity
- The number of beta particles emitted by a radioactive substance is twice the number
- For inelastic collision between two spherical rigid bodies
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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