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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?

13 mA
3.75 mA
3.2 mA
None of these
0.05 mA

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Electronic Principles
As the temperature increases, the current gain

None of these
increases
decreases
contant
can be any of the above

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Electronic Principles
Which one of the following equations most directly determines the power dissipation of a resistance when you know the power dissipation of a resistance when you know the voltage drop and current?

P = E2/R
None of these
P = I2R
P = IE
I = P/E

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Electronic Principles
The merging of a free electron and a hole is called

Thermal energy
Covalent bonding
None of these
Recombination
Lifetime

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Electronic Principles
Reducing the amount of current through an inductor:

reduces the value of inductance by one-half
None of these
has no effect on the inductance
multiplies the value of inductance by four
multiplies the value of inductance by two

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Electronic Principles
Which one of the following is most likely used for measuring the rate of electron flow?

None of these
Voltmeter
Ohmmeter
Wattmeter
Ammeter

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