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Electronic Principles

Electronic Principles
How much current flows through a 60-W light bulb that is operating at 120 V?

None of these
7200 A
0.5A
0.083333333333333
180 A

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Electronic Principles
Suppose a step-down transformer has a turns ration of 5:1. If the secondary current is 1A rms, what is the primary-current?

0.3 A
None of these
0.4 A
0.6 A
0.2 A

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Electronic Principles
What are the main parts of an atom?

None of these
Protons only
Electrons, protons, and neutrons
Electrons, protons, and ions
Electrons, ions, and neutrons

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Electronic Principles
To get the Norton current, you have to

Open the voltage source
None of these
Short the load resistor
Short the voltage source
Open the load resistor

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

4
14
None of these
29
48

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Electronic Principles
When the collector current increases, what does the current gain do?

any of the above
None of these
stays the same
increases
decreases

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