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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
- At 0⁰C, 15 gm of ice melts to form water at 0⁰C. The change in entropy is
- In producing chlorine through electrolysis 100 watt power at 1125 V is being
- A heavy small sized sphere is suspended by a string of length l.The sphere rotates
- A parallel beam of light of wavelength λ is incident normally on a narrow slit
- Three cells, each of e.m.f 1.5 V and internal resistance 1 ohm are connected in parallel
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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