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Electronic Principles

Electronic Principles
An audio transformer has a turn ratio of 9, What is its impedance ratio?

None of these
85
81
6
9

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Electronic Principles
Which one of the following equations most directly determines the power dissipation of a resistance when you know the power dissipation of a resistance when you know the voltage drop and current?

P = I2R
None of these
I = P/E
P = E2/R
P = IE

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Electronic Principles
The rotating coil of wire in an electric motor is called the:

None of these
brush
armature
commutator
loop

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

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

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Electronic Principles
Determine the resistance value and tolerance of a resistor that has the following color bands; first band is red, second band is red, third band is orange, and the fourth band is gold

22,000 Ohm, 5%
220 Ohm, 5%
220 Ohm, 10%
22, 000 Ohm, 10%
None of these

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Electronic Principles
Positive ions are atoms that have

Lost an electron
Lost a proton
Gained a proton
None of these
Gained an electron

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