1.

A 1φ , 120 v, 60 Hz supply is connected to the coil of the given circuit. The coil has 200 turns. The parameters of the core are as follows:Length of core = 100 cmCross – sectional area of core = 20 cm2Relative permeability of core = 2500Obtain an expression for the flux density in the core.

A. \(\frac{1}{{8.88}}\sin 2\pi 60\;t\;Tesla\)
B. \(\frac{1}{{0.888}}\sin t\;Tesla\)
C. \(\frac{1}{{0.888}}\sin 2\pi 60\;t\;Tesla\)
D. \(\frac{1}{{0.888}}sin{\rm{ }}2\pi {\rm{ }}t{\rm{ }}Tesla\)
Answer» D. \(\frac{1}{{0.888}}sin{\rm{ }}2\pi {\rm{ }}t{\rm{ }}Tesla\)


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