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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 remote-sensing satellite of earth revolves in a circular orbit at a height
- If liquid level falls in a capillary then radius of capillary will be
- The ratio of specific heats Cp/Cv=γ in terms of degrees of freedom (n) is given by
- Three cells, each of e.m.f 1.5 V and internal resistance 1 ohm are connected in parallel
- Which one of the following electrical meter has the smallest resistance?
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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