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Electronic Principles

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

0.5A
180 A
0.083333333333333
7200 A
None of these

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Electronic Principles
Assuming 100% efficiency, what is the power being applied to the primary winding of the transformer described in the above question?

200 W
100 W
None of these
1000 W
20 W

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Electronic Principles
As the temperature increases, the current gain

decreases
None of these
increases
contant
can be any of the above

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Electronic Principles
The transistor has a collector current of 2 mA. If the current gain is 135, what is the base current?

7.75 µA
10.3 µA
14.8 µA
7.8 µA
None of these

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Electronic Principles
A device that converts thermal energy to electrical energy is called a:

None of these
thermocouple
piezoelectric devices
solar cell
chemical cell

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Electronic Principles
A device that converts mechanical pressure to electrical energy is called a:

None of these
solar cell
nicad cell
piezoelectric device
photodiode

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