IH8PunkRok Posted February 24, 2010 Report Share Posted February 24, 2010 there is the diagram. i need to know what the voltage is across each of the 4 resistors. i believe R1 is 2V R2 is 4V R3 and R4 1/4V i think help me out anyone? -Matt2005 Dodge Magnum RTJVC KD-AVX1 2 PPI S580.2 Obsidian Audio ST1 Horn Tweeters PRV 8MB450s Audio Legion 3500.1D 2 RE MT 18s 360 ah LiFePO4 BatterySHCA 2/0 155.2 @ 29 hzKicker CVR 15's buildDD 3512e buildMini T-Line Build(6) 8s BuildNightshade 15s Wall BuildMagnum AB XFL 12s BuildNewest Magnum Build Link to comment Share on other sites More sharing options...
Ndnkobra Posted February 24, 2010 Report Share Posted February 24, 2010 Well i could be wrong but this is my 2 cents on how to think of it, the first thing you'd want to do is find the overall resistance of the circuit. r1 and r2 are in series and r3 and r4 are in parallel. so adding them all together would have a total of 20 ohms of resistance in the circuit. Now i dont know why i feel tempted to do this, but i want to take the resistance of each resistor and divide it by the total resistance of the circuit and multiply that by the voltage. So if you were to do that for r1, you'd get a voltage of 10V across the resistor, for r2 it would be 5V, r3 and r4 should both be 2.5V. When you add them together, they add up to 20 volts. Sad thing is i just covered this sections in physics a few weeks ago and i already forget how to do this shit. Someone will have to clarify me on this Link to comment Share on other sites More sharing options...
IH8PunkRok Posted February 24, 2010 Author Report Share Posted February 24, 2010 that looks right haha but i copied the question wrong i actually need to know the current not voltage but thanks for teaching me how to do voltage. i eally do appreciate it i need to know that too -Matt2005 Dodge Magnum RTJVC KD-AVX1 2 PPI S580.2 Obsidian Audio ST1 Horn Tweeters PRV 8MB450s Audio Legion 3500.1D 2 RE MT 18s 360 ah LiFePO4 BatterySHCA 2/0 155.2 @ 29 hzKicker CVR 15's buildDD 3512e buildMini T-Line Build(6) 8s BuildNightshade 15s Wall BuildMagnum AB XFL 12s BuildNewest Magnum Build Link to comment Share on other sites More sharing options...
Ndnkobra Posted February 24, 2010 Report Share Posted February 24, 2010 I think you're right about r1 and r2. since V/R gives you current. so 2A for r1 and 4A for r2. But for r3 and r4, remember that you can change those two 10 ohm parallel resistors to a 5 ohm series resistor, that would mean it would also be 4A. But since they're two parallel resistors the current splits in between the two resistors and so r3 and r4 both equal 2A. I THINK Link to comment Share on other sites More sharing options...
Boon Posted February 25, 2010 Report Share Posted February 25, 2010 R1 is 20v. Current across it is 2A. Heat dissipated is 40w. R2 is 10v. Current across it is 2A. Heat dissipated is 20w. R3 and R4 are both 10v, current across them is 1A, Heat dissipated is 10w. 10.x volts fo' life! Link to comment Share on other sites More sharing options...
IH8PunkRok Posted February 25, 2010 Author Report Share Posted February 25, 2010 why did the voltage from R1 to R2 go from 20v to 10v? -Matt2005 Dodge Magnum RTJVC KD-AVX1 2 PPI S580.2 Obsidian Audio ST1 Horn Tweeters PRV 8MB450s Audio Legion 3500.1D 2 RE MT 18s 360 ah LiFePO4 BatterySHCA 2/0 155.2 @ 29 hzKicker CVR 15's buildDD 3512e buildMini T-Line Build(6) 8s BuildNightshade 15s Wall BuildMagnum AB XFL 12s BuildNewest Magnum Build Link to comment Share on other sites More sharing options...
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