Electronic Principles
For normal operation of the transistor, the collector diode has to be

None of these
Nonconducting
Reverse-biased
Forward-biased
Operating in the breakdown region

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Electronic Principles
Which one of the following statements is true for the voltages in a series RL circuit?

The total voltages is equal to the sum of the voltages across the resistance and inductance
The total voltage is less than the sum of the voltages across the resistance and inductance
The total voltage lags the total current by less than 90
None of these
The voltage always has the same amplitude and phase for every part of the circuit

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

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

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