Electronic Principles
What kind of battery is most likely included in a cordless electric knife?

Mercury-cell battery
Nicad battery
Lead-acid battery
Zinc-carbon battery
None of these

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Electronic Principles
Which one of the following phrases most accurately describes a purely inductive circuit?

Resistances provide the only opposition to current flow
Combinations of resistance and inductive reactance provide any opposition to current flow
Inductive reactance provides the only opposition to current flow
The ac voltage lags the current by 90 degree
None of these

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

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

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Electronic Principles
The total capacitance of a series capacitor circuit is:

None of these
less than the value of the smallest capacitor
equal to the sum of the individual capacitance values
equal to the sun of the individual capacitive-reactance values
equal to the source voltage divided by total current

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