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Electronic Principles

Electronic Principles
How much current flows through a 60-W light bulb that is operating at 120 V?

0.083333333333333
0.5A
None of these
7200 A
180 A

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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?

0.5
4
0.25
180
None of these

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Electronic Principles
A flashlight battery has internal resistance of 1W. For what values of load resistance does the flashlight battery appear stiff?

None of these
60 Ohm
50 Ohm
100 Ohm or more
10 Ohm

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Electronic Principles
What is one important thing transistors do?

None of these
Regulate voltage
Emit light
Rectify line voltage
Amplify weak signals

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Electronic Principles
Who invented the first junction transistor?

Fisher
Shockley
Gomes
Smith
None of these

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Electronic Principles
Reducing the amount of current through an inductor:

multiplies the value of inductance by four
has no effect on the inductance
reduces the value of inductance by one-half
None of these
multiplies the value of inductance by two

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