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Joined Feb 4, 2005
1.A coil having 90 turns is connected to 120V,60Hz source.If the effective value of the magnetizing current is 4A,calculate:

a)the peak value of flux
b)the peak value of the m.m.f.
c)the inductive reactance of yhe coil
d)the inductance of the coil.

2.The no-load current of a transformer is 5.0A at 0.3 power factor when supplied at 240V,50Hz.The number of turns on the primary winding is 200.Calculate:

a)the maximum value of the flux in the core
b)the core loss
c)the magnetising current
d)the core loss current.