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Electronic Principles

Electronic Principles
The rotating coil of wire in an electric motor is called the:

None of these
armature
commutator
brush
loop

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Electronic Principles
If the current gain is 200 and the collector current is 100 mA, the base current is

200 A
0.083333333333333
0.5 mA
2 mA
None of these

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Electronic Principles
Household light bulbs have a given power rating, and they operate at 120 V. Which one of the following equations most directly provides the current rating of these light bulbs?

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

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Electronic Principles
Two diodes are in series. The first diode has a voltage of 0.75 V and the second has a voltage of 0.8 V. If the current through the first diode is 500 mA, what is the current through the second diode

None of these
11 mA
10 mA
12 mA
14 mA

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Electronic Principles
Current can flow through a normally open push button switch as long as:

you are pressing the button
its contact remain open
you are not pressing the button
None of these
its contact remain open

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Electronic Principles
Who invented the first junction transistor?

Gomes
None of these
Shockley
Fisher
Smith

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