Electronic Principles
Current is

None of these
An imbalance of electrical charges
The force that causes electrons to flow
The number of free electrons in an atom
The flow of charged particles through a material

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

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Electronic Principles
A farad is defined as the amount of capacitance necessary for:

causing an ac phase shift greater than 90 degree
None of these
storing 1 V for 1 second
dissipating 1 W of power
changing the voltage on the plates at the rate of 1 V per second when 1 A of current is flowing

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