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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
- If the kinetic energy of the particle is increased to 16 times its previous value
- The electrons are emitted in the photoelectric effect from a metal surface
- A 100Ω resistance and a capacitor of 100Ω reactance are connected in series
- Three objects A,B and C are kept in a straight line on a frictionless horizontal surface
- The de-Broglie wavelength of neutron in thermal equilibrium at temperature T is
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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