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Electronic Principles

Electronic Principles
How much power is being dissipated by a 1000 W resistance that has 25 V applied to it?

325 kW
0.625 W
80 W
None of these
0.24 W

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Electronic Principles
A step-up transformer has a turns ratio of 1:4. If the line voltage is 115 V rms, what is the peak secondary voltage?

208 V
700 V
None of these
707 V
651 V

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Electronic Principles
The voltage across a 1N4001 is 0.93V when the current is 1A. What is the power dissipation of the diode for these values?

0.93 V
9.3 W
0.041666666666667
0.93 W
None of these

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Electronic Principles
Which one of the following equations most directly leads to the resistance of an ordinary household light bulb, assuming that you know the power and voltage rating?

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

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Electronic Principles
Silicon atoms combine into an orderly pattern called a

None of these
Valence orbit
Crystal
Semiconductor
Covalent bond

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Electronic Principles
Doubling the diameter of the coil in an inductor:

multiplies the value of inductance by four
reduces the value of inductance by one-fourth
reduces the value of inductance by one-half
multiplies the value of inductance by two
None of these

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