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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
- If R is the radius of earth, the height at which the weight of a body 1/4 of its weight
- Pick out the correct statements from the following
- When a metallic surface is illuminated with radiation of wavelength λ,
- A plane electromagnetic wave of frequency 20 MHz travels through a space along
- A transformer rated at 10 kW is used to connect a 5 kV transmission line to a 240 V
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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