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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 wheel has angular acceleration of 3.0 rad/sec² and an initial angular speed of 2.00
- If the radius of star is R and it acts as a black body, what would be the temperature
- Find out the angle of projection, if range is 4 times of maximum height
- A nucleus at rest splits into two nuclear parts having radii in the ratio 1:2.
- Two sound waves of wavelengths 5m and 6m formed 30 beats in 3 seconds
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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