a sheet of relative permeability 100is placed inside a solenoid , so as to fill the space what - Physics - Electromagnetic Induction

Question

a sheet of relative permeability 100is placed inside a solenoid
, so as to fill the space what will be the energy stored inside the
solenoid ?

Pratyay Ghosh · Accepted Answer

The inductance of a solenoid is given by,
L=μrN2Al=100μ0N2Al
And the energy stored in a solenoid is,
P=12LI2=12100μ0N2AlI2=50μ0N2AI2l

a sheet of relative permeability 100is placed inside a solenoid , so as to fill the space . what will be the energy stored inside the solenoid.?