Answer to Question #162777 in Electric Circuits for Samanta

Question #162777

How do I calculate the resistence of R2 current, which is parallel to R1 (resistence 4 ohm, current 2,25 A). Additional to that I have a resistence R3 which is a series circuit (5 ohm) next to the R1 and R2. They are all on a 24 V battery.


1
Expert's answer
2021-02-11T12:01:11-0500

Current through resistance R3:

Voltage on R1:

U1=I1R1U_1=I_1R_1

Since R1 and R2 are parallel, then:

U1=U2=I2R2U_1=U_2=I_2R_2

Total voltage:

U=U1+U3=I1R1+I3R3U=U_1+U_3=I_1R_1+I_3R_3

Then:

I3=UI1R1R3=242.2545=3AI_3=\frac{U-I_1R_1}{R_3}=\frac{24-2.25\cdot4}{5}=3A

I2=I3I1=32.25=0.75AI_2=I_3-I_1=3-2.25=0.75A


R2=I1R1I2=2.2540.75=12R_2=\frac{I_1R_1}{I_2}=\frac{2.25\cdot4}{0.75}=12 ohm


Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Comments

No comments. Be the first!

Leave a comment