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Electronic Principles

Electronic Principles
Suppose the voltage from a power outlet is 120 Vrms. What is the peak voltage?

170 V
120 V
180 V
100 V
None of these

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Electronic Principles
What is the turns ratio for the transformer specified in the above question?

1.5
0.575
None of these
0.707
10.738

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Electronic Principles
A power transformer steps 100 V down to 10 V. If the current in its primary winding is 2 A, what is the current in the secondary winding?

20 A
50 A
0.20833333333333
None of these

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Electronic Principles
A device that converts mechanical pressure to electrical energy is called a:

piezoelectric device
photodiode
solar cell
None of these
nicad cell

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Electronic Principles
The equivalent of 1 megohms is:

None of these
one million ohms
1 k ohm
100,000 ohm
one-millionth of an ohm

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

armature
commutator
loop
None of these
brush

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