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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: - The friction of the air causes a vertical retardation equal to 10%
- When a metallic surface is illuminated with radiation of wavelength λ,
- A thin glass(refractive index 1.5) lens has optical power of -5D in air.
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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 friction of the air causes a vertical retardation equal to 10%
- When a metallic surface is illuminated with radiation of wavelength λ,
- A thin glass(refractive index 1.5) lens has optical power of -5D in air.
- Consider a compound slab consisting of two different materials having equal thickness
- For a cubic crystal structure which one of the following relations
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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