Electronic Principles
What is one important thing transistors do?

Rectify line voltage
Regulate voltage
None of these
Emit light
Amplify weak signals

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Electronic Principles
Doubling the operating frequency of a purely inductive circuit:

has no effect on the current through the inductors
doubles the amount of current through the inductors
None of these
cuts the current through the inductors one-half
increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit

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

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

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