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Electronic Principles

Electronic Principles
How much current flows through a 0.02-H choke that is operating from a 12-V ac, 100-Hz source?

2.02 A
None of these
0.41666666666667
0.955 A
0.02 A

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Electronic Principles
The Thevenin resistance is equal in value to the

Internal resistance of a Morton circuit
Half the load resistance
Open-load resistance
Load resistance
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?

68.4 mA
None of these
28.4 mA
24.2 mA
34.4 mA

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Electronic Principles
What is the barrier potential of a silicon diode at room temperature?

1 V
None of these
0.7V
0.3V
2 m V per degree Celsius

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Electronic Principles
What is the phase shift between total current and voltage, if 100 ohm resistor connected in parallel with an inductor that has a reactance of 200W?

0 degree
26.6 degree
90 degree
180 degree
None of these

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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?

12 V
30 V
None of these
18 V
24 V

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