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Electronic Principles

Electronic Principles
Who invented the first junction transistor?

Shockley
None of these
Fisher
Gomes
Smith

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Electronic Principles
What is the inductive reactance of a 2-H coil operating at 60 Hz?

None of these
30 Ohm
754 Ohm
60 Ohm
120 Ohm

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Electronic Principles
A transistor has a current gain of 125 and a base current of 30 µA. What is the collector current?

3.75 mA
13 mA
0.05 mA
3.2 mA
None of these

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Electronic Principles
Which one of the following devices is most often used for measuring electrical potential difference?

None of these
Voltmeter
Ammeter
Ohmmeter
Wattmeter

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

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

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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
200 k Ohm or more
20 k Ohm or more
200 k Ohm or less
20 km or less

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