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Electronic Principles

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

Voltmeter
None of these
Wattmeter
Ohmmeter
Ammeter

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Electronic Principles
Suppose a voltage source has an ideal voltage of 12V and an internal resistance of 0.5W. For what values of load resistance will the voltage source appear stiff?

6 Ohm
50 Ohm or more
None of these
100 Ohm
5 Ohm

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Electronic Principles
The barrier potential accross each depletion layer is

20 V
0.7 V
0.8 V
None of these

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Electronic Principles
The transistor has a collector current of 10 mA and a base current of 40 mA. What is the current gain of the transistor?

300 µA
350 µA
None of these
250 µA
0.25 µA

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Electronic Principles
If the current gain is 200 and the collector current is 100 mA, the base current is

0.5 mA
2 mA
None of these
200 A
0.083333333333333

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Electronic Principles
A real voltage source has

None of these
A small internal resistance
Zero internal resistance
Infinite internal resistance
A large internal resistance

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