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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
2.02 A
None of these
0.151 mA
0.995 mA

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Electronic Principles
What are the main parts of an atom?

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

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Electronic Principles
The number of free electrons and holes in intrinsic semiconductor increases when the temperature

None of these
Increases
Stays the same
Decreases
0oC

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Electronic Principles
Which one of the following properties of a magnetic circuit can be directly compared to current in an electrical circuit?

Reluctance
Flux density
Magnetomotive force
Number of lines of force
None of these

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Electronic Principles
At room temperature a conductor has low many holes?

Only those produced by thermal energy
less than the free electrons
many
Same number as free electrons
None of these

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Electronic Principles
The secondary voltage for a certain power transformer is twice the voltage applied to the primary. The current flowing in the secondary winding will be:

Same as the primary current
One-half the primary current
No more than 10% less than the primary current
None of these
Twice the primary current

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