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Electronic Principles

Electronic Principles
The number of free electrons and holes in intrinsic semiconductor increases when the temperature

Increases
0oC
None of these
Stays the same
Decreases

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Electronic Principles
A certain electromagnet has 1000 turns of wire. How much current must flow through the coil in order to generate an mmf of 100 ampere-turns?

None of these
100 A
1000 A
0.41666666666667
0.1 A

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Electronic Principles
Determine the resistance value and tolerance of a resistor that has the following color bands; first band is red, second band is red, third band is orange, and the fourth band is gold

22,000 Ohm, 5%
220 Ohm, 5%
220 Ohm, 10%
None of these
22, 000 Ohm, 10%

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Electronic Principles
How may valence electrons does a silicon atom have?

1
2
None of these
4

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Electronic Principles
The nucleus of the copper atom contains how many protons?

4
18
1
None of these
29

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Electronic Principles
Absolute Zero temperature equals

0o C
-276o C
None of these
25o C
-273o C

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