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Electronic Principles

Electronic Principles
Most AC power is obtained from:

None of these
batteries
oscillators
lightning
generators

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

thermocouple
piezoelectric devices
chemical cell
solar cell
None of these

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Electronic Principles
An intrinsic semiconductor has some holes in it at room temperature. What causes these holes?

Doping
None of these
Valence electrons
Free electrons
Thermal energy

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Electronic Principles
Suppose a voltage source has an ideal voltage of 15V and a source resistance of 0.2W. For what values of load resistance will the voltage source appear stiff?

20 Ohm
30 Ohm
None of these
10 Ohm
100 Ohm

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

Impossible to say
Neutral
Strong
Weak
None of these

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Electronic Principles
For normal operation of the transistor, the collector diode has to be

Reverse-biased
Operating in the breakdown region
Forward-biased
Nonconducting
None of these

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