Electronic Principles
The current gain of a transistor is defined as the ratio of the collector current to the

supply current
base current
None of these
emitter current
collector current

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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 causes current to flow in two directions at the same time
The voltage remains at one polarity and at a steady level
The voltage remains at one polarity but changes value periodically

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