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

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

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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
storing 1 V for 1 second
None of these
changing the voltage on the plates at the rate of 1 V per second when 1 A of current is flowing
dissipating 1 W of power

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Electronic Principles
For a pure capacitor:

ac current is converted to dc voltage
ac current and voltage are exactly in phase
ac current leads the voltage by 90 degree
None of these
ac current lags the voltage by 90 degree

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