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Electronic Principles

Electronic Principles
How much power is being dissipated by a 1000 W resistance that has 25 V applied to it?

80 W
None of these
325 kW
0.625 W
0.24 W

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Electronic Principles
A dielectric material is:

None of these
a good conductor of magnetic fields
a good insulator
a poor conductor of electrostatic fields
a good conductor

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Electronic Principles
The primary impedance of a transformer is 60 ohm and the secondary impedance is 120 ohm. What is the impedance ratio?

4
180
None of these
0.5
0.25

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Electronic Principles
Assuming 100% efficiency, what is the power being applied to the primary winding of the transformer described in the above question?

100 W
20 W
1000 W
None of these
200 W

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Electronic Principles
The graph of current gain versus collector current indicates that the current gain

equals the collector current divided by the base current
None of these
varies enormously
is contant
varies slightly

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Electronic Principles
What is the algebraic sum of this series of values:+2, -3, -6,+4?

-6
None of these
-3
2

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