Electronic Principles
A certain power transformer has a turns ratio of 5. What voltage can you expect at the secondary winding when you apply 120 V to the primary winding?

600 V
24 V
None of these
4.73
0.4 V

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Electronic Principles
The period of a waveform is:

the number of cycles completed in one second
the time required for the voltage to rise from 10% to 90% of the peak amplitude
equal to 0.707 times the peak amplitude
None of these
the time required to complete one full cycle

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Electronic Principles
The south pole of a magnet is the one:

that would be repelled by the north pole of another magnet
that has its molecules arranged in a random pattern
that would be attracted to the earth's south magnetic pole
None of these
that would be attracted to the earths north magnetic pole

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