JEE Main 202131 Aug, Evening shiftPhysicsHardMagnetic Effects of Current and Magnetism165× since 2002
A long solenoid with 1000 turns/m has a core material with relative permeability 500 and volume 10³ cm³. If the core material is replaced by another material having relative permeability of 750 with same volume maintaining same current of 0.75 A in the solenoid, the fractional change in the magnetic moment of the core would be approximately . Find the value of x.