A 200/100 V, 50 Hz transformer is to be excited at 40 Hz from the 100 V side. For the exciting current to remain the same, the applied voltage should be _______ V.

A 200/100 V, 50 Hz transformer is to be excited at 40 Hz from the 100

1.	A 200/100 V, 50 Hz transformer is to be excited at 40 Hz from the 100 V side. For the exciting current to remain the same, the applied voltage should be _______ V.
A.	10 V
B.	30 V
C.	40 V
D.	80 V
Answer» E.

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A 200/100 V, 50 Hz transformer is to be excited at 40 Hz from the 100 V side. For the exciting current to remain the same, the applied voltage should be _______ V.

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