Electronic Principles
The secondary voltage for a certain power transformer is twice the voltage applied to the primary. The current flowing in the secondary winding will be:

Twice the primary current
None of these
One-half the primary current
No more than 10% less than the primary current
Same as the primary current

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Electronic Principles
Which one of the following statements most accurately reflects the nature of ac power?

The current in an ac circuit flows in one direction, but changes value periodically
None of these
The current in an ac circuit flows in one direction at a steady level
The current in an ac circuit flows in two directions at the same time
The current in an ac circuit changes direction periodically

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