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

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

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

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

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