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JEE Main Physics Class 12 Magnetism and Matter Questions

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Question : 55

Total: 80

The B-H curve for a ferromagnet is shown in the figure. The ferromagnet is placed inside a long solenoid with 1000 turns/cm.. The current that should be passed in the solenoid to demagnetise the ferromagnet completely is:

[Online April 15, 2018]

2 mA
1 mA
40 µA
20 µA

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