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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 ratio of the numerical value of the average velocity and average speed
- If the temperature of the sun were to increase from T to 2T and its radius from R and 2R
- The de-Broglie wavelength of an electron is the same as that of a 50 KeV X-ray photon.
- The magnetic field in a certain region of space is given by B =8.35×10⁻² Î T.
- A capacitor of 2.5 μF is charged through a resistor of 4 MΩ. In how much time
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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