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

storing 1 V for 1 second
None of these
dissipating 1 W of power
causing an ac phase shift greater than 90 degree
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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Electronic Principles
Which one of the following phrasers best describes flux density?

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

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