Electronic Principles
The graph of current gain versus collector current indicates that the current gain

varies slightly
equals the collector current divided by the base current
varies enormously
None of these
is contant

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

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

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Electronic Principles
Which one of the following principles best describes the basic operation of an electromagnet?

Current is induced in a conductor that is moving through a magnetic field
Current flowing through a conductor generates a magnetic field
Like magnetic poles repel, while unlike poles attract
Like magnetic poles attract, while unlike poles repel
None of these

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