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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?

None of these
13 mA
3.75 mA
3.2 mA
0.05 mA

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Electronic Principles
Assuming 100% efficiency, what is the power being consumed at the secondary winding of the transformer described in question 91?

200 W
20 W
None of these
1000 W
100 W

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Electronic Principles
For normal operation of the transistor, the collector diode has to be

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

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Electronic Principles
At room temperature an intrinsic semiconductor has

None of these
many holes
a few free electrons and holes
many free electrons
No holes

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Electronic Principles
A circuit has two different voltage sources that are connected in a series-aiding form. If the sources are rated at 6 V and 9 V, what is the total source voltage?

7.5 V
None of these
16 V
8 V
15 V

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Electronic Principles
In an intrinsic semiconductor, the number of free electrons

None of these
Is less than the number of holes
Is greater than the number of holes
Impossible to say
Equals the number of holes

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