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Electronic Principles

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

38.74 V
37.4 V
None of these
35.4 V
30.4 V

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Electronic Principles
Which one of the following kinds of materials has the lowest permeability?

A paramagnetic material
A feiTomagnetic material
None of these
A diamagnetic material
All of these

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Electronic Principles
What are the main parts of an atom?

None of these
Electrons, protons, and ions
Protons only
Electrons, ions, and neutrons
Electrons, protons, and neutrons

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Electronic Principles
A dielectric material is:

a good conductor
None of these
a good insulator
a poor conductor of electrostatic fields
a good conductor of magnetic fields

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Electronic Principles
In a step-down transformer, which is larger?

None of these
Secondary voltage
Impossible to say
Neither
Primary voltage

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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
100 Ohm or more
50 Ohm
10 Ohm
None of these

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