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Electronic Principles

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

9
85
None of these
81
6

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Electronic Principles
A certain power transformer has a turns ratio of 5. What voltage can you expect at the secondary winding when you apply 120 V to the primary winding?

0.4 V
4.73
600 V
24 V
None of these

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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?

20 W
1000 W
200 W
100 W
None of these

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Electronic Principles
A device that converts thermal energy to electrical energy is called a:

None of these
thermocouple
solar cell
chemical cell
piezoelectric devices

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Electronic Principles
A device that converts chemical energy to electrical energy is called a:

electric device
thermocouple
chemical cell
solar cell
None of these

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Electronic Principles
A typical light switch in your home is a:

toggle switch
rotary switch
knife switch
None of these
momentary push button switch

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