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Electronic Principles

Electronic Principles
How much current flows through a 0.02 micro F capacitor that is operating from a 12-V ac, 100-Hz source?

2.02 A
None of these
0.151 mA
157 raA
0.995 mA

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Electronic Principles
The graph of current gain versus collector current indicates that the current gain

None of these
equals the collector current divided by the base current
varies slightly
is contant
varies enormously

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Electronic Principles
A circuit has two different voltage sources that are connected in a series-opposing form. If the sources are rated at 6 V and 9 V, what is the total source voltage?

3 V
16 V
7.5 V
None of these
8 V

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Electronic Principles
A step-up transformer has a turns ratio of 1:4. If the line voltage is 115 V rms, what is the peak secondary voltage?

None of these
651 V
700 V
707 V
208 V

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

Valence electrons
Free electrons
None of these
Thermal energy
Doping

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

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

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