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

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

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Electronic Principles
In a pure inductor:

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

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Electronic Principles
A farad is defined as the amount of capacitance necessary for:

storing 1 V for 1 second
changing the voltage on the plates at the rate of 1 V per second when 1 A of current is flowing
None of these
dissipating 1 W of power
causing an ac phase shift greater than 90 degree

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