Electronic Principles
The period of a waveform is:

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

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

None of these
The total voltage lags the total current by less than 90
The total voltage is less than the sum of the voltages across the resistance and inductance
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

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