Question on Ohm's Law?
Double check me.
Assume 12 volts is constant.
If I want to use 4 watts power, would I use a 36 Ohm resistor?
If I want to use 27 watts power, I w ould use a 5.33 Ohm resistor?
Double check me.
Assume 12 volts is constant.
If I want to use 4 watts power, would I use a 36 Ohm resistor?
If I want to use 27 watts power, I w ould use a 5.33 Ohm resistor?
Clive Mckraken
Favorite Answer
You got it right
billrussell42
12²/36 = 4 watts
and
12²/5.33 = 27 watts
now that was not very difficult, was it.
Anonymous
I really do not understand your question.
The values you give, the resistors would use the 4 and 27 watt.
So how are You going to use 4 or 27 watt if they're already being used?
Maybe I'm being pedantic.
Helmi
Basic Formula Ohm's Law :
i) V=IR
ii) P=IV
If P=4W
P=V^2/R
4=12^2/R
R=36ohm
If P=27W
P=V^2/R
27=12^2/R
R=5.333ohm
You're Answer Definitely Correct =)
?
P = E^2/R
R = E^2/P = 144/P
...so the values you give are correct.