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A bar magnet is hung by a thin cotton thread in a uniform horizontal magnetic field and is in equillibrium state. The energy required to rotate it by 60⁰ is W. Now the torque required to keep the magnet in this new position is
Options
(a) W/√3
(b) √3W
(c) √3W/2
(d) 2W/√3
Correct Answer:
√3W
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
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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 meter stick of mass 400 g is pivoted at one end and displaced through an angle 60°.
- A remote-sensing satellite of earth revolves in a circular orbit at a height
- An electric motor runs on DC source of emf 200 V and draws a current of 10 A.
- For a thermocouple, the neutral temperature is 270⁰C when its cold junction is at 20⁰C.
- A jar is filled with two non-mixing liquids 1 and 2 having densities
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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