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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: - Energy stored in the coil of a self inductance 40 mH carrying a steady current of 2A
- A thermodynamic system undergoes cyclic process ABCDA as shown in figure
- The two ends of a metal rod are maintained at temperatures 100°C and 110°C.
- The angular velocity of second’s hand of a watch is
- Which of the following pairs is wrong
Topics: Magnetic Effects of Current and Magnetism
(167)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Energy stored in the coil of a self inductance 40 mH carrying a steady current of 2A
- A thermodynamic system undergoes cyclic process ABCDA as shown in figure
- The two ends of a metal rod are maintained at temperatures 100°C and 110°C.
- The angular velocity of second’s hand of a watch is
- Which of the following pairs is wrong
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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