Electronic Principles
The total impedance of a parallel RLC circuit:

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

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Electronic Principles
Which one of. the following phrases most accurately describes the nature of a pulsating dc voltage?

The voltage remains at one polarity but changes value periodically
The voltage remains at one polarity and at a steady level
The voltage causes current to flow in two directions at the same time
None of these
The voltage reverses polarity periodically

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Electronic Principles
When applying a square waveform to a capacitor, the circuit tends to:

peak the current and round off the voltage waveforms
round off both the voltage and current waveforms
peak the voltage and round off the current waveforms
peak both the voltage and current waveforms
None of these

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