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Electronic Principles

Electronic Principles
A transistor has a current gain of 125 and a base current of 30 µA. What is the collector current?

None of these
13 mA
3.75 mA
0.05 mA
3.2 mA

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Electronic Principles
Holes act like:

Negative charges
None of these
Crystals
Positive charges
Atoms

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

Strong
Impossible to say
None of these
Weak
Neutral

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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?

10 Ohm
100 Ohm
None of these
30 Ohm
20 Ohm

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Electronic Principles
What kind of battery is most likely included in a cordless electric knife?

Nicad battery
Lead-acid battery
Zinc-carbon battery
None of these
Mercury-cell battery

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Electronic Principles
The total impedance of a series RLC circuit:

always increases as the applied frequency increases
always decreases as the applied frequency increases
is maximum at the resonant frequency
None of these
is minimum at the resonant frequency

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