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

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

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

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

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Electronic Principles
Which one of the following principles best describes the basic operation of an electromagnet?

Current flowing through a conductor generates a magnetic field
Like magnetic poles attract, while unlike poles repel
None of these
Like magnetic poles repel, while unlike poles attract
Current is induced in a conductor that is moving through a magnetic field

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