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

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

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Electronic Principles
The dielectric constant of a material is a measure of:

how well the material concentrates magnetic lines of force
the amount of voltage it can withstand before breaking down
how well the material concentrates electrostatic lines of force
the amount of opposition to the current flow
None of these

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Electronic Principles
Which one of the following statements is true for voltage in a series circuit?

The total voltage in a series circuit is equal to the average value of the individual voltages
The total voltage of a series circuit is equal to the total current divided by the total resistance
The total voltage in a series circuit is always less than the value of the smallest voltage
The total voltage is equal to the sum of the individual voltages in a series circuit
None of these

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

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
None of these
The circular magnetic field that surrounds a conductor carrying a current
The amount of magnetic flux that is not confined to the core material of an electromagnet

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Electronic Principles
Which one of the following phrases most accurately describes a purely inductive circuit?

The ac voltage lags the current by 90 degree
Inductive reactance provides the only opposition to current flow
Combinations of resistance and inductive reactance provide any opposition to current flow
Resistances provide the only opposition to current flow
None of these

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