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Electronic Principles

Electronic Principles
How many types of flow are there in a semiconductor?

3
2
1
None of these

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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?

None of these
34.4 mA
24.2 mA
28.4 mA
68.4 mA

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Electronic Principles
The voltage across a 1N4001 is 0.93V when the current is 1A. What is the power dissipation of the diode for these values?

9.3 W
None of these
0.041666666666667
0.93 W
0.93 V

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Electronic Principles
A step-down transformer has turns ration of 5:1. If the primary voltage is 120 Vrms, what is the secondary voltage?

18 V
30 V
None of these
24 V
12 V

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

60 V
None of these
36 V
0 V
40 V

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

has no effect on the total circuit current
thrice the amount of total current
None of these
doubles the amount of total current
cuts the total current by one-half

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