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Electronic Principles

Electronic Principles
The net charge of a neutral copper atom is

None of these
4
1
-1

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

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

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Electronic Principles
How many protons does the nucleus of a silicon atom contain?

29
48
None of these
14
4

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Electronic Principles
Doubling the operating frequency of a purely capacitive circuit:

thrice the amount of total current
None of these
doubles the amount of total current
has no effect on the total circuit current
cuts the total current by one-half

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Electronic Principles
What is the phase shift between total current and voltage, if 100 ohm resistor connected in parallel with an inductor that has a reactance of 200W?

26.6 degree
None of these
0 degree
90 degree
180 degree

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Electronic Principles
Who invented the first junction transistor?

Smith
Gomes
Shockley
None of these
Fisher

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