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Electronic Principles

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?

43891
43922
3
2
None of these

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Electronic Principles
The net charge of a neutral copper atom is

None of these
1
4
-1

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Electronic Principles
The primary impedance of a transformer is 60 ohm and the secondary impedance is 120 ohm. What is the impedance ratio?

0.25
4
180
0.5
None of these

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Electronic Principles
What are the main parts of an atom?

Electrons, ions, and neutrons
Electrons, protons, and ions
None of these
Electrons, protons, and neutrons
Protons only

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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 power dissipation of a resistance when you know the voltage drop and current?

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

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Electronic Principles
What is the barrier potential of a silicon diode at room temperature?

1 V
None of these
2 m V per degree Celsius
0.3V
0.7V

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