electrical resistance - Why does magnetic field increase when the .Aug 5, 2014 . now if I use the first method to increase the magnetic field then the length of conductor will also increase because I am increasing the number of.magnetic field increase,What are the ways to increase magnetic field strength? - QuoraDec 16, 2016 . By increasing coil supplied voltage. By increasing number of turns on core. By short circuiting coil conductors (terminals). By using material of.