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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.
Related Questions: - An ideal gas expands in such a manner that its pressure and volume can be related
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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
- An ideal gas expands in such a manner that its pressure and volume can be related
- The refractive index of water, glass and diamond are 1.33, 1.50, 2.40 respectively
- The core of a transformer is laminated because
- In a common emitter (CE) amplifier having a voltage gain G, the transistor
- Wave nature of light is verified by
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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