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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?

2
43922
None of these
43891
3

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Electronic Principles
What kind of device is a diode?

Bilateral
None of these
Unipolar
Linear
Nonlinear

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Electronic Principles
Which one of the following kinds of materials has the lowest permeability?

All of these
None of these
A diamagnetic material
A paramagnetic material
A feiTomagnetic material

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Electronic Principles
A diode is in series with 220W. If the voltage across the resister is 4V, what is the current through the diode?

55.86 A
None of these
16.3 mA
55 A
18.2 mA

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Electronic Principles
Suppose a current source has an Ideal current of 10 mA and an internal resistance of 20 MW. For what values of load resistance will the current source appear stiff?

None of these
20 km or less
200 k Ohm or more
20 k Ohm or more
200 k Ohm or less

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Electronic Principles
A typical light switch in your home is a:

toggle switch
knife switch
None of these
momentary push button switch
rotary switch

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