Electronic Principles
Voltage is

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

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Electronic Principles
For a pure capacitor:

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

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