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February 1, 2015

February 1, 2015

Posted by **Betty** on Tuesday, October 25, 2011 at 7:50pm.

The maximum number of volts, E, that can be placed across a resistor is given by the formula E=sq root(PR), where P is the number of watts of piwer that the resistor can absorb and R is the resistance of the resistor in ohms. Solve this equation for R. Use the result to determine the resistance of a resistor if P is 1/2 watts and E is 60 volts.

- Algebra -
**Steve**, Wednesday, October 26, 2011 at 5:27amE = √PR

E^{2}= PR

R = E^{2}/P

R = 3600/0.5 = 7200 ohms

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