.inductor-energy1{width:180px; height:186px ;}
.inductor-energy2{width:136px; height:87px ;}
.inductor-energy-problem1{width:183px; height:108px ;}
.inductor-energy-problem2{width:199px; height:168px ;}
.inductor-energy-problem3{width:183px; height:143px ;}
.inductor-energy-problem4{width:209px; height:158px ;}