when two resistors r1 and r2 are connected in parallel, the net resistance satisfies the equation: 1/r=1/r1+1/r^2
2007-09-26 05:04:50 · 4 answers · asked by tankwillmsg 1 in Science & Mathematics ➔ Mathematics
1/r=1/r1+1/r2
1/r=r1+r2/r1r2
r = r1r2/r1+r2
2007-09-26 05:13:06 · answer #1 · answered by jaya 2 · 0⤊ 0⤋
Hi,
The general equation for parallel resistances can be used. For two resistances, you can use the formula that you gave, or solving for r:
r = 1/(1/r1 +1/r2)
For the special case of two resistances in parallel, I find it easier to use the formula:
r = (r1*r2)/(R1 +R2)
FE
2007-09-26 12:40:12 · answer #2 · answered by formeng 6 · 0⤊ 0⤋
no, 1/r = 1/r2 + 1/r2
2007-09-26 12:07:20 · answer #3 · answered by CRAZYDEADMOTH 3 · 0⤊ 0⤋
jaya is correct-give her 5 stars and 10 points!
2007-09-26 12:35:23 · answer #4 · answered by Grampedo 7 · 0⤊ 0⤋