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

None of these
base current
supply current
collector current
emitter current

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Electronic Principles
Which one of the following phrases most accurately describes a purely capacitive circuit?

Capacitive reactance provides the only opposition to current flow
None of these
Combinations of resistance and capacitive reactance provide any opposition to current flow
Resistances provide the only opposition to current flow
The ac voltage leads the current by 90 degree

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Electronic Principles
What is the primary difference between primary and secondary cell batteries?

Primary-cell batteries use chemical cells, whereas secondary-cell batteries use an alternative energy source, such as thermal or magnetic energy, to supplement their outputs
None of these
Secondary-cell batteries can be recharged and used many times, whereas primary-cell batteries cannot be properly recharged
Primary-cell batteries must be recharged at a much slower rate that secondary-cell batteries
Primary-cell batteries can be recharged and used many times, whereas secondary-cell batteries cannot be properly recharged

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