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Electronic Principles

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

Ohmmeter
Ammeter
Voltmeter
None of these
Wattmeter

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Electronic Principles
A loadstone is:

a temporary magnet
an artificial magnet
a natural magnet
None of these
a paramagnetic alloy

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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?

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

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Electronic Principles
Which one of the following properties of a magnetic circuit can be directly compared to resistance in an electrical circuit?

Reluctance
Retentivity
Permeance
Permeability
There is no valid comparison

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Electronic Principles
An ideal voltage source has

Zero internal resistance
A load-dependent current
None of these
Infinite internal resistance
A load dependent voltage

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

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

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