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

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

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

The ac voltage lags the current by 90 degree
None of these
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

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