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Electronic Principles

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

None of these
photo transistor
solar cell
photodiode
thermocouple

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Electronic Principles
Suppose the peak value of a sinusoidal voltage is 50 V. What is the rms value?

30.4 V
None of these
38.74 V
35.4 V
37.4 V

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Electronic Principles
An unloaded zener regulator has a source voltage of 20 V, a series resistance of 330 W, and a zener voltage of 12 V, What is the Zener current?

28.4 mA
68.4 mA
None of these
24.2 mA
34.4 mA

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Electronic Principles
The knee voltage of a diode is approximately equal to the

None of these
Breakdown voltage
Barrier potential
Forward voltage
Applied voltage

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Electronic Principles
What is the turns ratio for the transformer specified in the above question?

0.707
0.575
10.738
1.5
None of these

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Electronic Principles
A circuit has two different voltage sources that are connected in a series-aiding form. If the sources are rated at 6 V and 9 V, what is the total source voltage?

15 V
None of these
16 V
8 V
7.5 V

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