A square voltage wave having a fundamental frequency of 60

A square voltage wave having a fundamental frequency of 60

A square voltage wave having a fundamental frequency of 60 Hz and equal positive and negative half cycles of amplitude E is applied to a 1000-turn winding surrounding a closed iron core of 1.25 x 10–3 m2 cross section. Neglect both the winding resistance and any effects of leakage flux.
a. Sketch the voltage, the winding flux linkage, and the core flux as a function of time.
b. Find the maximum permissible value of E if the maximum flux density is not to exceed 1.15 T.

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