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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
- If fundamental frequency of closed pipe is 50 Hz then frequency of 2nd overtone
- Planck’s constant has same dimensions as those of
- A particle starts its motion from rest under the action of a constant force
- A gas of monoatomic hydrogen is bombarded with a stream of electrons
- A spherical body of emissivity e=0.6, placed inside a perfectly black body is maintained
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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