Electronic Principles
A device that converts mechanical pressure to electrical energy is called a:

solar cell
piezoelectric device
photodiode
nicad cell
None of these

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Electronic Principles
The rms value of a sine waveform is:

the time required to complete one full cycle
equal to 1.41 times the peak amplitude
None of these
the number of cycles completed in one second
equal to 0.707 times the peak amplitude

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Electronic Principles
Which one of the following statements best applies to a series RLC circuit?

The sum of the current is always less than the applied current
None of these
The current waveform for each component always has the same amplitude and phase as the applied current
All of these
The voltage waveform for each component always has the same amplitude and phase as the applied voltage

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Electronic Principles
For a pure capacitor:

ac current lags the voltage by 90 degree
ac current leads the voltage by 90 degree
ac current is converted to dc voltage
ac current and voltage are exactly in phase
None of these

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