Electronic Principles
What is the difference between a conductor and an insulator?

None of these
An insulator allows current to flow much easier than a conductor does
The difference between conductors and insulators depends on how they are used
An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all
A conductor allows current to flow much easier than an insulator does

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Electronic Principles
Which one of the following statements is true for current flowing in a parallel circuit?

The amount of current flow through each branch of a parallel circuit can be different, depending on the resistance of each branch part and the amount of voltage applied to it
The same current always flows through every part of a parallel circuit
None of these
The total current in a parallel circuit is always less than the smallest amount of current
The total current in a parallel circuit is equal to the total voltage multiplied by the total resistance

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Electronic Principles
Which one of the following phrases best describes residual magnetism?

The amount of magnetic flux that is not confined to the core material of an electromagnet
The force of attraction between the poles of a permanent and temporary magnetic field
The circular magnetic field that surrounds a conductor carrying a current
None of these
Magnetism that remains in the core of an electromagnet after the current through the coil is turned off

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Electronic Principles
The rms value of a sine waveform is:

the time required to complete one full cycle
the number of cycles completed in one second
equal to 1.41 times the peak amplitude
equal to 0.707 times the peak amplitude
None of these

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