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Electronic Principles

Electronic Principles
A transistor has a current gain of 125 and a base current of 30 µA. What is the collector current?

3.2 mA
13 mA
None of these
0.05 mA
3.75 mA

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Electronic Principles
Which one of the following properties of a magnetic circuit can be directly compared to current in an electrical circuit?

Magnetomotive force
Flux density
Number of lines of force
None of these
Reluctance

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Electronic Principles
Which one of the following devices is most often used for measuring opposition to current flow in a circuit?

Ohmmeter
None of these
Ammeter
Voltmeter
Wattmeter

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Electronic Principles
The basic unit of measurement for current is the:

None of these
ohm
volt
ampere
watt

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Electronic Principles
To get the Thevenin voltage, you have to

Open the voltage source
Short the load resistor
None of these
Open the load resister
Short the voltage source

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Electronic Principles
A device that converts chemical energy to electrical energy is called a:

electric device
chemical cell
thermocouple
solar cell
None of these

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