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Electronic Principles

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

60 V
40 V
None of these
0 V
36 V

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Electronic Principles
What is the turns ratio for the transformer specified in the above question?

10.738
1.5
None of these
0.707
0.575

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Electronic Principles
What is the turns ratio of a power transformer that shows 50 V at its secondary winding when you apply 150 V to its primary winding?

3
43891
None of these
2
43922

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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?

None of these
600 V
0.4 V
24 V
4.73

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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 voltage drop and amount of resistance?

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

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Electronic Principles
What is the phase shift between total current and voltage in the circuit of a 100 ohm resistor connected in parallel with a capacitor that has a reactance of 100 ohm

75 degree
45 degree
30 degree
None of these
180 degree

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