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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 horizontal and vertical components of earth’s magnetic field at a place
- For a parallel beam of monochromatic light of wavelength λ diffraction is produced
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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 horizontal and vertical components of earth’s magnetic field at a place
- For a parallel beam of monochromatic light of wavelength λ diffraction is produced
- In case of linearly polarised light, the magnitude of the electric field vector
- In the phenomenon of electric discharge through gases at low pressure,
- If the rise in height of capillary of two tubes is 6.6 cm and 2.2 cm
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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