Electronic Principles
The transistor has a collector current of 2 mA. If the current gain is 135, what is the base current?

7.8 µA
14.8 µA
None of these
10.3 µA
7.75 µA

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Electronic Principles
What is a negative ion?

An atom that contains more electrons than neutrons
An atom that contains more protons than electrons
An atom that contains more protons than neutrons
An atom that contains more electrons than protons
None of these

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Electronic Principles
Which one of the following phrasers best describes flux density?

None of these
The rate of change of the number of lines of magnetic force
The force that maintains lines of force
The concentration of lines of magnetic force
The opposition to a build-up of magnetic fields

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