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Electronic Principles

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

7200 A
180 A
0.5A
None of these
0.083333333333333

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Electronic Principles
What is the inductive reactance of a 2-H coil operating at 60 Hz?

754 Ohm
60 Ohm
30 Ohm
120 Ohm
None of these

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Electronic Principles
Which one of the following equations most directly determines the amount of current flowing through a resistor when you know the value of the resistor and the voltage drop across it?

I = ER
E = PR
None of these
E = I2R
I = E/R

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

None of these
piezoelectric device
photodiode
solar cell
nicad cell

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Electronic Principles
Doubling the number of turns of wire in an inductor:

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

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Electronic Principles
The graph of current gain versus collector current indicates that the current gain

is contant
varies slightly
varies enormously
None of these
equals the collector current divided by the base current

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