Electronic Principles
The transistor has a collector current of 10 mA and a base current of 40 mA. What is the current gain of the transistor?

300 µA
350 µA
0.25 µA
None of these
250 µA

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Electronic Principles
Which one of the following statements applies to common auto batteries?

None of these
Auto batteries are secondary dry-cell batteries
Auto batteries are secondary wet-cell batteries
Auto batteries are primary wet-cell batteries
Auto batteries are primary dry-cell batteries

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

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

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Electronic Principles
Which one of the following principles best describes the basic operation of a generator?

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

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