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Electronic Principles

Electronic Principles
An audio transformer has a turn ratio of 9, What is its impedance ratio?

None of these
85
9
81
6

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Electronic Principles
The number of free electrons and holes in intrinsic semiconductor increases when the temperature

Stays the same
None of these
0oC
Increases
Decreases

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

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

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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?

0.041666666666667
None of these
0.93 V
0.93 W
9.3 W

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Electronic Principles
What is the impedance of a circuit composed of a 100 ohm resistor connected in parallel with an inductor that has a reactance of 200 W?

224 ohm
77.7 ohm
None of these
88.8 ohm
89.3 ohm

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Electronic Principles
What is the inductive reactance of a 0.1-H coil that is operating at 1000 Hz?

None of these
100 Ohm
444 Ohm
628 Ohm
Less than 1 Ohm

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