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Electronic Principles

Electronic Principles
Most AC power is obtained from:

lightning
batteries
oscillators
generators
None of these

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

9
85
6
81
None of these

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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?

None of these
100 W
1000 W
200 W
20 W

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Electronic Principles
If N1/N2 = 2, and the primary voltage is 120 V, what is the secondary voltage?

0 V
36 V
40 V
None of these
60 V

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Electronic Principles
Current can flow through a normally open push button switch as long as:

you are not pressing the button
you are pressing the button
None of these
its contact remain open
its contact remain open

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Electronic Principles
How may valence electrons does a silicon atom have?

2
None of these
1
4

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