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Electronic Principles

Electronic Principles
A device that converts mechanical into electrical energy is?

generator
solar cell
chemical cell
thermocouple
None of these

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Electronic Principles
To get the Norton current, you have to

Open the load resistor
Short the voltage source
Short the load resistor
Open the voltage source
None of these

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

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

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Electronic Principles
Current and voltage are said to be in phase when:

their waveforms cross through zero and reach positive and negative peaks at the same time
their waveforms are both ac or both dc
All of these
None of these
they have the same amplitude and frequency

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

None of these
1
2
3

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Electronic Principles
At room temperature an intrinsic semiconductor has

a few free electrons and holes
many holes
None of these
many free electrons
No holes

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