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
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

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

The same current always flows through every part of a parallel circuit
None of these
The total current in a parallel circuit is equal to the total voltage multiplied by the total resistance
The total current in a parallel circuit is always less than the smallest amount of current
The amount of current flow through each branch of a parallel circuit can be different, depending on the resistance of each branch part and the amount of voltage applied to it

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Electronic Principles
What is a free electron?

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

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