how many watt resistor do i need for 2 volts 1 ohm

[loadhead]

How big a resistor is it to handle 2 volts at 1 ohm??

 

[loadhead]

Oh yeh I get it now... thankyou...

 

[Minder]

IF you mean 2v drop across the resistor then I=E/R 4W

 

[ramussons]

IF you mean 2v drop across the resistor then I=E/R 4W

P=E^2/R = 4W

 

[Alec_t]

But if you want the resistor to have a long and happy life you need to choose one with a Wattage rating well above 4w, e.g. a 10W rating.

 

[danadak]