I
ITSME.ULTIMATE
- Jan 1, 1970
- 0
Ok, using ohm's law, in a DC circuit, we can say that:
power=
(V^2)/R
I^2 * R
V * I
But what if you have a one ohm resistor?
Example, one ohm resistor with 0.25A going through.
V=I*R, so V= 0.25 x 1 = 0.25A
using the formula, power = V*I, you get 0.25W
but using the other formula (V^2)/R, you get 0.0625W
0.0625 != 0.25W
Let's try 4 ohm resistor with 0.5A flowing through:
V=I*R, V= 0.5 x 4 = 2V
P= V*I = 2 x 0.5 = 1W
P=(V^2)/R = (2^2)/4 =1W
P= (I^2) * R = (0.5 x 0.5) * 4 =1W
Why isn't it working and what did I not do right?
power=
(V^2)/R
I^2 * R
V * I
But what if you have a one ohm resistor?
Example, one ohm resistor with 0.25A going through.
V=I*R, so V= 0.25 x 1 = 0.25A
using the formula, power = V*I, you get 0.25W
but using the other formula (V^2)/R, you get 0.0625W
0.0625 != 0.25W
Let's try 4 ohm resistor with 0.5A flowing through:
V=I*R, V= 0.5 x 4 = 2V
P= V*I = 2 x 0.5 = 1W
P=(V^2)/R = (2^2)/4 =1W
P= (I^2) * R = (0.5 x 0.5) * 4 =1W
Why isn't it working and what did I not do right?