Answer to Question 5

Show that the equations used in this alternative approach give a consistent end result, B = m_{0}nI

Magnetomotive force F_{m} = NI where N is the total number of turns.

Magnetizing force H = NI/l

B = m_{0}H = m_{0}NI/l

Number of turns per metre, n = N/l

B = m_{0}nI (QED)