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Electronic Principles

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

None of these
loop
brush
commutator
armature

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Electronic Principles
Which one of the following properties of a magnetic circuit can be directly compared to current in an electrical circuit?

Magnetomotive force
Flux density
Number of lines of force
Reluctance
None of these

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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
0.93 W
0.041666666666667
None of these
9.3 W

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Electronic Principles
The valence electron of a copper atom experiences what kind of attraction toward the nucleus?

Strong
None of these
Impossible to say
Weak
Neutral

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Electronic Principles
At room temperature an intrinsic semiconductor has

a few free electrons and holes
None of these
many holes
No holes
many free electrons

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Electronic Principles
Assuming 100% efficiency, what is the power being consumed at the secondary winding of the transformer described in question 91?

None of these
200 W
20 W
1000 W
100 W

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