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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
- A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV.
- A fluid is in streamline flow across a horizontal pipe of variable area of cross section
- A charged oil drop is suspended in a uniform field at 3×10⁴ V/m so that it neither falls
- The electric resistance of a certain wire of iron is R. If its length and radius
- The magnifying power of a convex lens of focal length 10 cm, when the image
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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