.coil-magnetic-field1{width:157px; height:156px ;}
.coil-magnetic-field2{width:170px; height:154px ;}
.coil-magnetic-field3{width:200px; height:153px ;}
.coil-magnetic-field4{width:190px; height:219px ;}
.coil-magnetic-field5{width:210px; height:121px ;}
.coil-magnetic-field6{width:259px; height:113px ;}
.coil-magnetic-field7{width:210px; height:139px ;}
.coil-magnetic-field8{width:210px; height:256px ;}
.Coil-magnetic-field-formula{width:141px; height:160px ;}
.coil-magnetic-field9{width:169px; height:116px ;}
.coil-magnetic-field10{width:180px; height:139px ;}
.coil-magnetic-field11{width:175px; height:127px ;}
.coil-magnetic-field12{width:180px; height:138px ;}
.coil-magnetic-field13{width:196px; height:112px ;}