Electronic Principles
For a pure capacitor:

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

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Electronic Principles
What is the difference between a conductor and an insulator?

A conductor allows current to flow much easier than an insulator does
The difference between conductors and insulators depends on how they are used
An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all
None of these
An insulator allows current to flow much easier than a conductor does

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