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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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- A beaker of radius 1.5 cm is filled with a liquid of surface tension 0.075 N/m
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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
- Two particles A and B having equal charges, after being accelerated
- A beaker of radius 1.5 cm is filled with a liquid of surface tension 0.075 N/m
- Hydrogen atom in ground state is excited by a monochrmatic radiation of λ=975 Å
- A 50 ohm galvanometer gets full scale deflection when a current of 0.01 A passes
- A bottle full of water in a space ship at 30⁰C is carried on the moon.
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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