Electronic Principles
The direction of conventional current flow is:

from negative to positive
from neutral to positive
from positive to negative
None of these
from left to right

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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
None of these
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

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

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

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