Electronic Principles
Which one of the following statements is true for the voltages in a series RL circuit?

None of these
The voltage always has the same amplitude and phase for every part of the circuit
The total voltages is equal to the sum of the voltages across the resistance and inductance
The total voltage is less than the sum of the voltages across the resistance and inductance
The total voltage lags the total current by less than 90

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Electronic Principles
The peak value of a sine waveform is:

the amplitude at 90% of the maximum value
None of these
the maximum positive or negative value
the amplitude at 1.41 times the maximum value
the amplitude at 70.7% of the maximum value

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

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

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