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I have to count the total current. U = 10V. R1=100 OHM. R2+R4 are connected in a row, r2 is 470 ohm and r4 is 330 ohm. r3 and r5 are connected in a row. r3 is 390OHM and r5 is 220 OHMS. r24 is connected beside r35. r1 is connected in a row with r24+r35

 May 11, 2014

Best Answer 

 #1
avatar+33658 
+5

I assume that by "row" you mean "in series" and by "beside" you mean "in parallel".  If that is the case then the following diagram illustrates your circuit:

circuit 

Resistances in series simply add:  R24 = R2+R4 and R35 = R3 + R5

For resistances in parallel: 1/R2345 = (1/R24) + (1/R35)

Then R1 and R2345 are in series so Rtotal = R1 + R2345

The total current is then given by I = U/Rtotal

Can you take it from there?

(You should find that I ≈ 0.0224 A)

 May 11, 2014
 #1
avatar+33658 
+5
Best Answer

I assume that by "row" you mean "in series" and by "beside" you mean "in parallel".  If that is the case then the following diagram illustrates your circuit:

circuit 

Resistances in series simply add:  R24 = R2+R4 and R35 = R3 + R5

For resistances in parallel: 1/R2345 = (1/R24) + (1/R35)

Then R1 and R2345 are in series so Rtotal = R1 + R2345

The total current is then given by I = U/Rtotal

Can you take it from there?

(You should find that I ≈ 0.0224 A)

Alan May 11, 2014

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