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ELECTRONIC PRINCIPLES

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

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

36 V
60 V
None of these
40 V
0 V

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

photo transistor
None of these
thermocouple
photodiode
solar cell

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Electronic Principles
How much current flows through a 60-W light bulb that is operating at 120 V?

None of these
7200 A
0.5A
180 A
0.083333333333333

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Electronic Principles
What is the power dissipation of a resistance that has 24 V dropped across it and 0.25 A flowing through it?

3 W
64 W
6 W
None of these
122 W

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