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Electronic Principles

Electronic Principles
Which is the most widely used semiconductor?

Germanium
Silicon
Copper
All of these
None of these

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Electronic Principles
What are the main parts of an atom?

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

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

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Electronic Principles
A flashlight battery has internal resistance of 1W. For what values of load resistance does the flashlight battery appear stiff?

10 Ohm
100 Ohm or more
None of these
60 Ohm
50 Ohm

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Electronic Principles
Which one of the following equations most directly determines the power dissipation of a resistance when you know the voltage drop and amount of resistance?

P = IE
P = I2R
P = E2/R
None of these
I = P/E

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Electronic Principles
If N1/N2 = 2, and the primary voltage is 120 V, what is the secondary voltage?

None of these
36 V
40 V
0 V
60 V

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