The coercivity of a bar magnet is 4000A/m .In order to demagnetize it is placed inside a…
Physics · JEE Main · NTA Exams — Magnetic Effects of Current and Magnetism
The coercivity of a bar magnet is 4000A/m .In order to demagnetize it is placed inside a solenoid of length 12 cm and having 60 turns. What current should be passed through the solenoid?
- 2A
- 4A
- 8A
- 16A
Answer
(C) 8A
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