Electronic Principles
Household light bulbs have a given power rating, and they operate at 120 V. Which one of the following equations most directly provides the current rating of these light bulbs?

I = P/E
P = IE
None of these
P = E2/R
P = I2R

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Electronic Principles
For a pure capacitor:

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

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