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Electronic Principles

Electronic Principles
A device that converts mechanical into electrical energy is?

solar cell
generator
chemical cell
thermocouple
None of these

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Electronic Principles
At room temperature an intrinsic semiconductor has

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

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Electronic Principles
What is the barrier potential of a silicon diode at room temperature?

2 m V per degree Celsius
0.3V
None of these
0.7V
1 V

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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?

100 A
0.41666666666667
None of these
0.1 A
1000 A

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Electronic Principles
What is the smallest number of polarities required for current flow?

Three - negative, positive and neutral terminals
None of these
One - a negative terminal
Four - two negative and two positive
Two - a negative terminal and a positive terminal

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Electronic Principles
Norton's theorem replaces a complicated circuit facing a load by an

Ideal voltage source and parallel resistor
Ideal current source and parallel resistor
Ideal current source and series resistor
Ideal voltage source and series resistor
None of these

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