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

None of these
piezoelectric devices
chemical cell
thermocouple
solar cell

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Electronic Principles
For a pure capacitor:

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

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Electronic Principles
Voltage is

The number of free electrons in an atom
The flow of charged particles through a material
The smallest electrically charged particle
Trie force that causes electrons to flow
None of these

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