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

14.8 µA
None of these
10.3 µA
7.75 µA
7.8 µA

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Electronic Principles
Which one of the following statements most accurately reflects the nature of ac power?

None of these
The current in an ac circuit changes direction periodically
The current in an ac circuit flows in one direction, but changes value periodically
The current in an ac circuit flows in two directions at the same time
The current in an ac circuit flows in one direction at a steady level

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Electronic Principles
What is the difference between the kinds of charges for an electron and a proton?

None of these
An electron has a positive charge and a proton has no charge
An electron has a negative charge and a proton has no charge
An electron has a negative charge and a proton has a positive charge
An electron has a positive charge and a proton has a negative charge

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