The coercitivity of a small magnet where the ferromagnet gets demagnetized is
Channel: Doubtnut
Date: 2020-07-05

The coercitivity of a small magnet where the ferromagnet gets demagnetized is `3 xx 10^(3) Am^(-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 :