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Homework Statement
What is the power consumed when plugging an iron with a rating of 10 amps to a 120 volt outlet?
Homework Equations
(watts/volts)=amps
The Attempt at a Solution
(w/120)=10 amps
120= 10 amps (w)
120/10=12
12 watts.
Homework Statement
What is the power consumed when plugging an iron with a rating of 10 amps to a 120 volt outlet?
Homework Equations
(watts/volts)=amps
The Attempt at a Solution
(w/120)=10 amps
120= 10 amps (w)
120/10=12
12 watts.
Is this iron designed for 120V?
I know my country uses 240V, but I could always take my iron to the US ans plug it in. I wouldn't work very well - certainly wouldn't draw 10 amps - but I could connect it without problems.
Homework Statement
What is the power consumed when plugging an iron with a rating of 10 amps to a 120 volt outlet?
Homework Equations
(watts/volts)=amps
The Attempt at a Solution
(w/120)=10 amps
120= 10 amps (w)
120/10=12
12 watts.
Is the voltage of AC mains power [that the hypothetical iron is designed for] really relevant to the problem? .
Certainly is.
If this iron is labelled 10A, 240V then the resistance of the heating element will be 24Ω [when hot]
If this iron is labelled 10A, 120V then the resistance of the heating element will be 12Ω [when hot]
Depending on the voltage label on the iron, the results will be quire different.
The other two questions posted by OP efer to 220V. It is common to consider what happens when a device is connected to an incorrect power supply.
For me, where we use 240V, my devices simply run slowly/inefficiently if the mains electricity is too low. If an American brings something to Australia and connects it, it will simply burn out and perhaps trip the fuse.