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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
0.05 mA
13 mA
3.75 mA
None of these

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Electronic Principles
Which one of the following devices is most often used for measuring electrical potential difference?

None of these
Ammeter
Wattmeter
Ohmmeter
Voltmeter

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Electronic Principles
The emitter diode is usually

None of these
Forward-biased
Reverse-biased
Operating in the breakdwon region
Nonconducting

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Electronic Principles
Which one of the following equations most directly leads to the resistance of an ordinary household light bulb, assuming that you know the power and voltage rating?

I = P/E
R = E2/P
P = PR
None of these
P = E2/R

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Electronic Principles
Positive ions are atoms that have

Gained an electron
None of these
Lost a proton
Lost an electron
Gained a proton

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Electronic Principles
The barrier potential accross each depletion layer is

0.8 V
20 V
0.7 V
None of these

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