JEE Main 2014 Question Paper

Section: Physics

Question : 12 of 90

Marks: +1, -0

The coercivity of a small magnet where the ferromagnet gets demagnetized is 3×103Am−1.The current required to be passed in a solenoid of length 10 cm and number of turns 100,so that the magnet gets demagnetized when inside the solenoid,is:

[Main 2014]

3A
6A
30 mA
60 mA

Validate

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