Electronic Principles
The period of a waveform is:

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

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Electronic Principles
The total impedance of a parallel RLC circuit:

is equal to the sum of the values of resistance, inductive reactance and capacitive reactance
None of these
always decreases as the applied frequency increases
is maximum at the resonant frequency
always increases as the applied frequency increases

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