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Electronic Principles

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

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

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Electronic Principles
If a load resistance is 1 kW, a stiff current source has a resistance of

None of these
Less than 10 Ohm
More than 100 k Ohm
At least 10 Ohm
Less than 100 k Ohm

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Electronic Principles
A certain power transformer has a turns ratio of 5. What voltage can you expect at the secondary winding when you apply 120 V to the primary winding?

24 V
600 V
4.73
0.4 V
None of these

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Electronic Principles
If the base supply voltage increases, the Q point moves

nowhere
down
None of these
off the load line
up

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Electronic Principles
What is the total resistance of a parallel circuit that contains two resistors having values of 220 ohm and 470 ohm?

220 ohm
690 ohm
None of these
445 ohm
150 ohm

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Electronic Principles
A zener regulator has an input voltage from 15 to 20 V and a load current from 5 to 20 mA. If the zener voltage is 6.8 V, what value should the series resistor have?

550 Ohm
400 Ohm
None of these
310 Ohm
410 Ohm

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