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Electronic Principles

Electronic Principles
What is the turns ratio of a power transformer that shows 50 V at its secondary winding when you apply 150 V to its primary winding?

43891
43922
3
None of these
2

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

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

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Electronic Principles
Suppose the voltage from a power outlet is 120 Vrms. What is the peak voltage?

120 V
170 V
100 V
None of these
180 V

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Electronic Principles
Suppose a step-down transformer has a turns ration of 5:1. If the secondary current is 1A rms, what is the primary-current?

0.6 A
0.3 A
0.2 A
None of these
0.4 A

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Electronic Principles
What causes the depletion layer?

Recombination
Ions
Barrier potential
Doping
None of these

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Electronic Principles
What is one important thing transistors do?

Rectify line voltage
None of these
Emit light
Amplify weak signals
Regulate voltage

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