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Electronic Principles

Electronic Principles
Which is the most widely used semiconductor?

Copper
Germanium
None of these
All of these
Silicon

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

cuts the capacitive reactance in half
multiplies the capacitive reactance by 7
None of these
doubles the amount of capacitive reactance
has no effect on the capacitive reactance

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Electronic Principles
A power transformer steps 100 V down to 10 V. If the current in its primary winding is 2 A, what is the current in the secondary winding?

20 A
None of these
0.20833333333333
50 A

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Electronic Principles
The value of a capacitor can be made larger by:

increasing the area of the plates
decreasing the area of the plates
increasing the frequency of the applied voltage
None of these
increasing the voltage applied to the plates

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Electronic Principles
A device that converts mechanical into electrical energy is?

None of these
solar cell
chemical cell
generator
thermocouple

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Electronic Principles
A basic capacitor is composed of:

None of these
two conductors separated by a dielectric
two dielectrics separated by a conductor
two coils separated by a conductor
two coils separated by a dielectric

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