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Resistor Circle

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well now that's a part where im not so good in..
If Vdrop is 5ohms * 4A then it's 20V
so R12 = 20V ?
R1 = R2 = 10V ?
 
well now that's a part where im not so good in..
If Vdrop is 5ohms * 4A then it's 20V
so R12 = 20V ?
R1 = R2 = 10V ?

No, dont forget you have calculated the parallel value for R1 and R2

so its just 5 ohms,, as U1 =44V the the drop across R1 and R2 is 20V.

You now know the voltage across R6, which is 44-20 = 24V

so calculate the current thru R6.....?
 
now it's getting confuseing.
okei, R6 is 10 ohms and voltage is 24 ohms..
then i think I = 10 / 24 = 2,4A ?
am i right?
 
now it's getting confuseing.
okei, R6 is 10 ohms and voltage is 24 ohms..
then i think I = 10 / 24 = 2,4A ?
am i right?

Good, thats correct.. 2.4A
So the next step is to work out the current thru R3 R4 and R5

You have already worked out that all together R3,4 and 5 are 15Ohms

so whats the current thru this 15 ohms, you know the voltage is 24V

I = 24V/15R =...... ?
 
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okei, 24V / 15R = 1,6 ohms
so R345 = 1,6 ohms ?

o yes, my bad.. 1,6A ?
 
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okei, 24V / 15R = 1,6 ohms
so R345 = 1,6 ohms ?

Its actually 1.6 Amps not ohms.

You are almost there!

You know now the current is 1.6Amp

so work out the voltage drop across the R3 resistor

Vdrop= 1.6A * 10R = ........ ?
 
Voltage drop across the R3 = 1.6A * 10R = 16V ?
that means R3 is 16V ?

So R4 = R5 = 4 V?
 
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Voltage drop across the R3 = 1.6A * 10R = 16V ?
that means R3 is 16V ?

ok, just one more step and youre done.

Across R4 and R5 is 24V - 16V = 8V

so now work out the current thru R4..

I= 8V/10R =..... ?

The R5 is the same.!

Now fill in the question list and post it.:)
 
I = 4A, U = 44V and R = 11 ohms
I1= 2A U1= 10V
I2= 2A U2= 10V
I3= 1,6A U3= 16V
I4= 0,8A U4= 8V
I5= 0,8A U5= 8V
I6= 2,4A U6= 24V

Am i right?
 
I = 4A, U = 44V and R = 11 ohms
I1= 2A U1= 10V
I2= 2A U2= 10V
I3= 1,6A U3= 16V
I4= 0,8A U4= 8V
I5= 0,8A U5= 8V
I6= 2,4A U6= 24V

Am i right?

All ok except U1 and U2, remember the first voltage drop you calculated..
 
o yes.. U1 = U2 = 20V..
im going to do it one more time by myself.
Thanks a lot for your help :)
I was looking for help from everywhere.
 
o yes.. U1 = U2 = 20V..
im going to do it one more time by myself.
Thanks a lot for your help :)
I was looking for help from everywhere.

Well done.:)

Thats it, now rework all the calculations from the beginning so that you fully understand.

You can use the same method to solve most resistor circuits.

Good Luck.
 
Thanks ericgibbs :)
i did it this time alone, and yout method rocks !!
i don't know how to thank you man :p
Respect+ !

Edit: Does someone have any that kind exercises that i could do? I would really like it... going to have big test soon.
 
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