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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: - In the Young’s double slit experiment, a point P on the central bright fringe
- A circular coil of radius 10cm and 100 turns carries a current 1 A.
- If the half-life of a material is 10 yr, then in what time, it becomes 1/4th part
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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
- In the Young’s double slit experiment, a point P on the central bright fringe
- A circular coil of radius 10cm and 100 turns carries a current 1 A.
- If the half-life of a material is 10 yr, then in what time, it becomes 1/4th part
- An object is seen through a simple microscope of focal length 12 cm.
- Calculate the focal length of a reading glass of a person, if the distance
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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