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Electronic Principles

Electronic Principles
How much current flows through a 0.02-H choke that is operating from a 12-V ac, 100-Hz source?

None of these
0.02 A
0.41666666666667
0.955 A
2.02 A

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Electronic Principles
Assuming 100% efficiency, what is the power being applied to the primary winding of the transformer described in the above question?

100 W
None of these
20 W
1000 W
200 W

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Electronic Principles
The graph of current gain versus collector current indicates that the current gain

varies slightly
None of these
is contant
equals the collector current divided by the base current
varies enormously

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Electronic Principles
What causes the depletion layer?

Ions
Doping
None of these
Recombination
Barrier potential

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Electronic Principles
An audio transformer has a turn ratio of 9, What is its impedance ratio?

6
9
85
81
None of these

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Electronic Principles
Suppose the zener diode has a breakdown voltage of 10 V and zener resistance of 8.5 W, what is the additional voltage when the current is 20 mA?

10.17 V
0.17 V
18.8 V
None of these
20 V

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