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Electronic Principles

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

None of these
0.575
10.738
1.5
0.707

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Electronic Principles
A transformer has a primary voltage of 120 V rms and a secondary voltage of 25 V rms. If the secondary current is 1A rms, what is the primary current?

None of these
7.8 mA
300 mA
200 mA
208 mA

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Electronic Principles
To get the Norton current, you have to

None of these
Short the voltage source
Open the load resistor
Open the voltage source
Short the load resistor

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

piezoelectric device
None of these
photodiode
solar cell
nicad cell

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Electronic Principles
What are the main parts of an atom?

Protons only
Electrons, ions, and neutrons
Electrons, protons, and neutrons
Electrons, protons, and ions
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?

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

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