Electronic Principles
A basic capacitor is composed of:

two conductors separated by a dielectric
two dielectrics separated by a conductor
two coils separated by a conductor
two coils separated by a dielectric
None of these

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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 rate of change of the number of lines of magnetic force
The concentration of lines of magnetic force

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

The algebraic sum of currents in a loop is equal to zero
The current through a resistance is proportional to the value of resistance and the IR drop across it
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
None of these

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

None of these
The amount of magnetic flux that is not confined to the core material of an electromagnet
Magnetism that remains in the core of an electromagnet after the current through the coil is turned off
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

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