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A 144.0watt heater is running in your lounge supplied by a 119.3volt supply, what is the resistance of the element?
Guest Mar 27, 2012
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 #1
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P=U.I I=U/R hence P= U^2/R and R=U^2/P

So R = 119.3^2 /144 = 98,8 Ohm
ricom39  Mar 27, 2012
 #2
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R= P /I^2 or R= U^2/P or R= U /I

R= Resistance in Ohms
P= Wattage
I= Amperage
U= Volts
smjones  Mar 27, 2012

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