Electronic Principles
A power transformer steps 100 V down to 10 V. If the current in its primary winding is 2 A, what is the current in the secondary winding?

50 A
20 A
0.20833333333333
None of these

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Electronic Principles
The total capacitance of a series capacitor circuit is:

equal to the sum of the individual capacitance values
equal to the source voltage divided by total current
None of these
equal to the sun of the individual capacitive-reactance values
less than the value of the smallest capacitor

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Electronic Principles
Which one of the following principles best describes the basic operation of an electromagnet?

Current flowing through a conductor generates a magnetic field
Current is induced in a conductor that is moving through a magnetic field
Like magnetic poles attract, while unlike poles repel
None of these
Like magnetic poles repel, while unlike poles attract

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

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

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