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Electronic Principles

Electronic Principles
Suppose the peak value of a sinusoidal voltage is 50 V. What is the rms value?

None of these
38.74 V
30.4 V
37.4 V
35.4 V

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

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

brush
None of these
armature
commutator
loop

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Electronic Principles
What is one important thing transistors do?

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

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Electronic Principles
A certain electromagnet has 1000 turns of wire. How much current must flow through the coil in order to generate an mmf of 100 ampere-turns?

0.1 A
100 A
1000 A
None of these
0.41666666666667

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Electronic Principles
As the temperature increases, the current gain

increases
contant
None of these
decreases
can be any of the above

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