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Electronic Principles

Electronic Principles
The net charge of a neutral copper atom is

1
4
-1
None of these

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

thermocouple
solar cell
chemical cell
None of these
generator

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

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

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Electronic Principles
In a step-down transformer, which is larger?

Primary voltage
Neither
Secondary voltage
Impossible to say
None of these

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Electronic Principles
The barrier potential accross each depletion layer is

0.8 V
20 V
0.7 V
None of these

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Electronic Principles
Assuming 100% efficiency, what is the power being consumed at the secondary winding of the transformer described in question 91?

100 W
20 W
200 W
None of these
1000 W

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