# SOLUTION: w = EI the problem wants a solution for I, and W is wattage, however, it does not state if it is 110 watt or 220 watt, E is for voltaqge and I is for resistance. My question is how

Algebra ->  Algebra  -> Vectors -> SOLUTION: w = EI the problem wants a solution for I, and W is wattage, however, it does not state if it is 110 watt or 220 watt, E is for voltaqge and I is for resistance. My question is how      Log On

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 Algebra: Introduction to vectors, addition and scaling Solvers Lessons Answers archive Quiz In Depth

 Click here to see ALL problems on Vectors Question 54740: w = EI the problem wants a solution for I, and W is wattage, however, it does not state if it is 110 watt or 220 watt, E is for voltaqge and I is for resistance. My question is how do I know what the the resistance is if I don't know what the voltage is, (110/220W)? Can u help? Answer by ankor@dixie-net.com(15649)   (Show Source): You can put this solution on YOUR website!: w = E*I, where E = voltage and I = current (not resistance) : Perhaps they want you to assume 120 volts which is the voltage at a standard outlet. : Ohm's law is helpful: Resistance: R = E/I, Current: I = E/R, Voltage: E = IR : More power (in watts) equations: P = I^2 * R P = E^2/R