# Please help physics thank you so much?

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- billrussell42Lv 71 year agoFavorite Answer
current flows through, not across

first get total R

20 parallel with 35 = 20•35/55 = 12.73

in series with 15 that is 27.73

Total I = 10/27.73 = 0.3607 amps

that produces voltage across the parallel pair of

E = IR = 0.3607 x 12.73 = 4.591 volts

and that produces a current thru the 20 of

I = E/R = 4.591 / 20 = 0.23 amps

- runningman022003Lv 71 year ago
Find the effective resistance of the two resistors in parallel. 1/R=1/20+1/35

This is in series with the 15 ohm so simply add R+15 = total resistance

Find current via V=IR

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