Science question??

1 ⤊

If power is the product of voltage and current (P= IV) and voltage is the product of current and resistance (V= IR), what equation gives the relation among power, current, and resistance?

2007-12-14 03:27:06 · 3 answers · asked by Shae 2 in Science & Mathematics ➔ Engineering

3 answers

P = I^2 * R

likewise, P = V^2/R

2007-12-14 05:18:28 · answer #1 · answered by Gary H 6 · 0⤊ 0⤋

You want to eliminate V. So first, you need to express V in terms of I and R. Then you have to multiply that by I to get P in terms of just I and R.

V == I * R
P == V * I == (I * R) * I
so P == I ** 2 * R.

2007-12-14 11:33:00 · answer #2 · answered by sparky_dy 7 · 1⤊ 0⤋

P equals I squared times R

2007-12-14 11:35:20 · answer #3 · answered by Poor one 6 · 0⤊ 1⤋