r1=5 ohms
r3=15 ohms
compared to heat developed in resistor r1 the heat developed in r3 is
one third as great
two thirds as great
3 times as great
one forth as great
2007-03-17 05:33:52 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics
We need to know whether the same voltage is applied across the resistors (ie in parallel), or whether the same current flows through both (ie the resistors are in series).
2007-03-17 05:45:12 · answer #1 · answered by dudara 4 · 0⤊ 0⤋
For the same voltage that is applied across the resistor, the current I = V / R and heat = V X I = V^2/R. So, the higher the resistance, the lesser the heat. In this case since R3 is 15 ohms and is 3 times the R1, the heat generated will be one third (1/3) as great.
2007-03-17 12:41:28 · answer #2 · answered by Swamy 7 · 0⤊ 0⤋
You didn't mention anything about electricity. Since you have no voltage or current then the heat produced by both resistors is zero.
2007-03-17 12:42:12 · answer #3 · answered by Anonymous · 0⤊ 0⤋