Electronic Principles
Which one of the following equations most directly determines the power dissipation of a resistance when you know the power dissipation of a resistance when you know the voltage drop and current?

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

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Electronic Principles
What is the primary difference between primary and secondary cell batteries?

None of these
Primary-cell batteries can be recharged and used many times, whereas secondary-cell batteries cannot be properly recharged
Secondary-cell batteries can be recharged and used many times, whereas primary-cell batteries cannot be properly recharged
Primary-cell batteries use chemical cells, whereas secondary-cell batteries use an alternative energy source, such as thermal or magnetic energy, to supplement their outputs
Primary-cell batteries must be recharged at a much slower rate that secondary-cell batteries

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Electronic Principles
The total capacitance of a series capacitor circuit is:

equal to the source voltage divided by total current
equal to the sum of the individual capacitance values
None of these
equal to the sun of the individual capacitive-reactance values
less than the value of the smallest capacitor

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