Electronic Principles
For a pure capacitor:

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

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Electronic Principles
What is a free electron?

An electron that costs nothing
An electron that has been freed from its parent atom
None of these
An electron that has twice the amount of charge of a normal electron
An electron that has no electrical charge

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Electronic Principles
Which one of the following is a statement of KirchhofFs voltage law?

None of these
The total voltage in a parallel circuit is less than the value of the smallest voltage
The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it
The algebraic sum of voltages entering and leaving a point is equal to zero
The algebraic sum of voltages in a loop is equal to zero

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