Electronic Principles
Current is

None of these
An imbalance of electrical charges
The number of free electrons in an atom
The force that causes electrons to flow
The flow of charged particles through a material

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Electronic Principles
For a pure capacitor:

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

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Electronic Principles
Which one of the following statements is true for the currents in a series RC circuit?

The total current is less than the sum of the currents for the resistance and capacitance
The total current is equal to the sum of the currents for the resistance and capacitance
The total current is greater than the sum of the currents for the resistance and capacitance
None of these
The current always has the same amplitude and phase for every part of the circuit

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