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

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

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Electronic Principles
Which one of the following phrasers best describes flux density?

The force that maintains lines of force
None of these
The opposition to a build-up of magnetic fields
The concentration of lines of magnetic force
The rate of change of the number of lines of magnetic force

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Electronic Principles
Which one of the following is a statement of Kirchhoffs current law?

The total current in a parallel circuit is less than the value of the smallest current
The algebraic sum of currents entering and leaving a point is equal to zero
The current through a resistance is proportional to the value of resistance and the IR drop across it
None of these
The algebraic sum of currents in a loop is equal to zero

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

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

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