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

The total resistance in a parallel circuit is equal to the average value of the individual resistances
None of these
The total resistance of a parallel circuit is equal to the total voltage
The total resistance of a parallel circuit is always less than the value of the smallest resistance
The total resistance is equal to the sum of the individual resistances in a parallel circuit.

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

None of these
A conductor allows current to flow much easier than an insulator 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
An insulator allows current to flow much easier than a conductor does

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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
None of these
The force of attraction between the poles of a permanent and temporary magnetic field
Magnetism that remains in the core of an electromagnet after the current through the coil is turned off
The circular magnetic field that surrounds a conductor carrying a current

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