clear
//Given
L=500*10**-3
I1=20*10**-3                  //A
I2=10*10**-3                  //A

//Calculation
U1=0.5*L*I1**2
U2=0.5*L*I2**2

//Result
printf("\n Magnetic energy stored in the coil is %0.3f  *10**-4 J",U1*10**6)
printf("\n New value of energy is %0.3f  J",U2)