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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?

157 raA
0.151 mA
0.995 mA
2.02 A
None of these

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

3.75 mA
0.05 mA
None of these
13 mA
3.2 mA

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Electronic Principles
Current and voltage are said to be in phase when:

All of these
None of these
their waveforms cross through zero and reach positive and negative peaks at the same time
they have the same amplitude and frequency
their waveforms are both ac or both dc

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Electronic Principles
Current can flow through a normally open push button switch as long as:

its contact remain open
you are pressing the button
None of these
its contact remain open
you are not pressing the button

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

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

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Electronic Principles
Absolute Zero temperature equals

0o C
-276o C
None of these
25o C
-273o C

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