[7 31 (a)] and [7 32 (a)], we have
s
s
p
p
v
N
v
=N
(7 33)
Note that the above relation has been obtained using three
assumptions: (i) the primary resistance and current are small; (ii) the
same flux links both the primary and the secondary as very little flux
escapes from the core, and (iii) the secondary current is small