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 remains at one polarity but changes value periodically
None of these
The voltage reverses polarity periodically
The voltage remains at one polarity and at a steady level

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Electronic Principles
Which one of the following statements is true for voltage in a parallel circuit?

The total voltage is equal to the sum of the voltages across the individual branches in a parallel circuit
The total voltage of a parallel circuit is the same as the voltages across each branch
The total voltage in a parallel circuit is always less than the value of the smallest voltage
The total voltage in a parallel circuit is equal to the average value of the individual voltages
None of these

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