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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
- The electric field part of an electromagnetic wave in a medium is represented by
- A body is moving with velocity 30 m/s towards east. After 10 seconds its velocity
- A particle moves along the x-axis from x=0 to x=5 m under the influence of a force
- The power obtained in a reactor using U²³⁵ disintegration is 1000 kW
- A person wants a real image of his own, 3 times enlarged. Where should he stand
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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