When a current carrying wire is placed into a magnetic field there will be a force. Using Fleming's Left Hand rule. They also said that by increasing the number of turns of the coil will increase the force. But how does this increase the force? Also, by placing a soft iron rod inside the coil will also increase the force. But how does it increase the force? I know that the magnetic field lines will be concentrated but I'm unsure how it increases the force. My level of education is secondary 4 and sitting for the GCE O levels Thanks for the help!