Magnetic Effects of Current and Magnetism: JEE Main 2014 Physics question

JEE Main 2014 · Session, Shift 1 · Q7636

JEE Main 2014Session, Shift 1PhysicsMediumMagnetic Effects of Current and Magnetism165× since 2002

The coercivity of a small magnet where the ferromagnet gets demagnetized is

3 \times {10^3}\,A{m^{ - 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 :

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JEE Main 2014 Magnetic Effects of Current and Magnetism Question with Solution (Session Shift 1, Q7636) | JEE Arc