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Electronic Principles

Electronic Principles
Holes act like:

Negative charges
Positive charges
None of these
Atoms
Crystals

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Electronic Principles
The number of free electrons and holes in intrinsic semiconductor increases when the temperature

Increases
0oC
Stays the same
None of these
Decreases

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Electronic Principles
Suppose a step-down transformer has a turns ration of 5:1. If the secondary current is 1A rms, what is the primary-current?

None of these
0.2 A
0.4 A
0.3 A
0.6 A

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Electronic Principles
In a transistor operates at the middle of the load line, an increase in the base resistance will move the Q point

None of these
up
down
off the load line
nowhere

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Electronic Principles
To get the Norton current, you have to

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

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Electronic Principles
At room temperature an intrinsic semiconductor has

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

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