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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
- When the wave of hydrogen atom comes from infinity into the first orbit,
- Two charged particles have charges and masses in the ratio 2:3 and 1:4 respectively.
- The electric potential at the surface of an atomic nucleus (z=50) of radius
- Three solids of masses m₁,m₂ and m₃ are connected with weightless string
- Laser beams are used to measure long distance because
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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