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Electronic Principles

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

thermocouple
None of these
generator
solar cell
chemical cell

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Electronic Principles
The net charge of a neutral copper atom is

4
None of these
-1
1

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Electronic Principles
Holes act like:

Atoms
Negative charges
Crystals
Positive charges
None of these

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Electronic Principles
The basic unit of measurement for current is the:

ohm
ampere
None of these
volt
watt

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Electronic Principles
A real voltage source has

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

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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?

0.3 A
0.4 A
0.2 A
None of these
0.6 A

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