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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
2
3
None of these
43922

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Electronic Principles
A zener diode has a voltage of 10 V and a current of 20 mA. What is the power dissipation?

300 mW
200 mW
20 mW
None of these
10 mW

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Electronic Principles
As the temperature increases, the current gain

increases
decreases
contant
can be any of the above
None of these

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Electronic Principles
Assuming 100% efficiency, what is the power being applied to the primary winding of the transformer described in the above question?

20 W
200 W
100 W
1000 W
None of these

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

None of these
3
1
2

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Electronic Principles
What is the capacitive reactance of a 0.1 micro F capacitor that is operating at 1000 Hz?

690 Ohm
1590 Ohm
less than 1 Ohm
None of these
312 Ohm

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