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A bar magnet has a coercivity of 4×10³ Am⁻¹. It is placed inside a solenoid of length 12 cm having 60 turns in order to demagnetise it. The amount of current that should be passed through the solenoid is
Options
(a) 16A
(b) 8A
(c) 4A
(d) 2A
Correct Answer:
8A
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 wheel has angular acceleration of 3.0 rad/sec² and an initial angular speed of 2.00
- The electric potential V at any point (x,y,z) all in meters in space is given by
- Weber ampere per metre is equal to
- In Young’s experiment, the third bright band for light of wavelength 6000Å
- A bar magnet of magnetic moment M is placed at right angles to a magnetic
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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