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Electronic Principles

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

2
1
4
None of these

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Electronic Principles
A resistor has a rated value of 100 ohm and a tolerance of 10%. What is its minimum and maximum allowable resistance value?

90 Ohm - 101 ohm
None of these
98 Ohm - 100.1 ohm
90 Ohm - 110 ohm
99 Ohm - 102 ohm

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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?

0.1 A
None of these
0.41666666666667
1000 A
100 A

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Electronic Principles
If a load resistance is 1 kW, a stiff current source has a resistance of

More than 100 k Ohm
Less than 10 Ohm
Less than 100 k Ohm
At least 10 Ohm
None of these

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Electronic Principles
At room temperature a conductor has low many holes?

None of these
less than the free electrons
Only those produced by thermal energy
Same number as free electrons
many

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

None of these
thermocouple
photodiode
photo transistor
solar cell

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