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JEE Main20248 Apr 2024Evening ShiftPhysicsMagnetic Properties of MatterActual

The coercivity of a magnet is 5 10^3 ~A / m . The amount of current required to be passed in a solenoid of length 30 ~cm and the number of turns 150 , so that the magnet gets demagnetised when inside the solenoid is _____A.

Correct answer

0

Step-by-step solution

aligned & H _ c = _ o ni _ o & 5 10^3= 150 30 100 i & 50 5 = i & I =10 aligned

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