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?

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

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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
None of these
the amount of opposition to the current flow
how well the material concentrates electrostatic lines of force
how well the material concentrates magnetic lines of force

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Electronic Principles
Which one of the following statements is true for the voltage in a parallel RC circuit?

None of these
The total voltage is less than the sum of the voltages across the resistance and capacitance
The voltage always has the same amplitude and phase for every part of the circuit
The total voltage is equal to the sum of the voltages across the resistance and capacitance
The total voltage leads the total current by less than 90 degree

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