Electronic Principles
Which one of. the following phrases most accurately describes the nature of a pulsating dc voltage?

None of these
The voltage reverses polarity periodically
The voltage remains at one polarity but changes value periodically
The voltage remains at one polarity and at a steady level
The voltage causes current to flow in two directions at the same time

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Electronic Principles
Which one of the following is a statement of Kirchhoffs current law?

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

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