- #1

glid02

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Here's the question:

As seen in the figure below, R1 = 4.00 W, R2 = 8.00 W, R3 = 8.00 W, R4 = 4.00 W, E1 = 50.0 V and E2 = 20.0 V.

(I can't copy image so here it is)

...R1

_____/\/\/\__________________

|......|...|....|

|......|...|....|

__.....|...|...._

_..E1.....\.../.R3...__..E2

|...R2./...\.....|

|......|...|...R4...|

|____________|_____|__/\/\___|

(Current from E1 flows to R1 and current from E2 flows to R4.)

I'm supposed to find the power supplied to R1, R2, R3 and R4.

I chose to find the power supplied to R4 first

The 50V charge encounters a resistance of 8 ohm (4+ (64/16)) before reaching R4 and the 20V charge encounters no resistance before reaching R4.

First I tried not including the resistance in R4 which would give

(50/8)^2 * 4 + 20^2 * 4 and that wasn't correct.

Then I tried including the resistance in R4 which would give (50/12)^2 * 4 +

(20/4)^2 * 4 and that wasn't correct either.

I also tried combining the currents before squaring them -

(50/8+20)^2 * 4 and (50/12+20/4)^2 * 4 - and that did not give me the right answer.

I don't know what else to try and the book/internet isn't much help. Any ideas would be appreciated.

Thanks a lot.

As seen in the figure below, R1 = 4.00 W, R2 = 8.00 W, R3 = 8.00 W, R4 = 4.00 W, E1 = 50.0 V and E2 = 20.0 V.

(I can't copy image so here it is)

...R1

_____/\/\/\__________________

|......|...|....|

|......|...|....|

__.....|...|...._

_..E1.....\.../.R3...__..E2

|...R2./...\.....|

|......|...|...R4...|

|____________|_____|__/\/\___|

(Current from E1 flows to R1 and current from E2 flows to R4.)

I'm supposed to find the power supplied to R1, R2, R3 and R4.

I chose to find the power supplied to R4 first

The 50V charge encounters a resistance of 8 ohm (4+ (64/16)) before reaching R4 and the 20V charge encounters no resistance before reaching R4.

First I tried not including the resistance in R4 which would give

(50/8)^2 * 4 + 20^2 * 4 and that wasn't correct.

Then I tried including the resistance in R4 which would give (50/12)^2 * 4 +

(20/4)^2 * 4 and that wasn't correct either.

I also tried combining the currents before squaring them -

(50/8+20)^2 * 4 and (50/12+20/4)^2 * 4 - and that did not give me the right answer.

I don't know what else to try and the book/internet isn't much help. Any ideas would be appreciated.

Thanks a lot.

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