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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 radioactivity of a certain material drops to 1/16 of the initial value in 2 hours.
- A thin convex lens of refractive index 1.5 has 20 cm focal length in air. If the lens
- Number of electrons in one mC charge, given e=1.6×10⁻¹⁹ C, will be
- Three resistances P,Q,R each of 2Ω and an unknown resistances S form the four arms
- An electron in potentiometer experiences a force 2.4×10⁻¹⁹N. The length of potentiometer
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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