Hello
How to Find Vab in this Circuits ?
MOD:fixed your image.

 

Looking round the loop, what is the total resistance and the total voltage (remember to account for the polarity of the voltages).

 

Is this a homework question ?

Les.

 

Is this a homework question ?

It even says HW on the top of the image.

 

Yea it is HW, But
I do not know what the answer is, i need help
You must answer the question using kvl

 

Looking round the loop, what is the total resistance and the total voltage (remember to account for the polarity of the voltages).

The Rt is 50 ohm
But I dont Know What is The Total Voltage

 

Hi kubeek,
I missed that. I think we should wait for a reply to AlbertHall's question from the TS as AlbertHall's question is a pretty good hint about how to start.

Hi Abdullah,
If you can't answer the two questions I can't think of any other clues without answering your question. We only help with homework we do not answer the question.

Edit. I have just seen that you have worked out the total resistance. Try breaking the loop and see if you can calculate the voltage between the two open ends.

Les.

 

The Rt is 50 ohm
But I dont Know What is The Total Voltage

To get the total resistance you added up the values of the individual resistors. Now do the same for the voltage sources, taking note of their polarity.

 

Hi kubeek,
I missed that. I think we should wait for a reply to AlbertHall's question from the TS as AlbertHall's question is a pretty good hint about how to start.

Hi Abdullah,
If you can't answer the two questions I can't think of any other clues without answering your question. We only help with homework we do not answer the question.

Edit. I have just seen that you have worked out the total resistance. Try breaking the loop and see if you can calculate the voltage between the two open ends.

Les.

The Rt is 50 ohm
and the Vt is 15 V
Is this true ??

The question must be resolved by KVL

 

To get the total resistance you added up the values of the individual resistors. Now do the same for the voltage sources, taking note of their polarity.

The Vt is 15 v ???

The question must be resolved by KVL

 

The Vt is 15 v ???

The question must be resolved by KVL

OK.
You can use what you've already found out and follow the example here: https://electronics.stackexchange.c...ne-analyze-a-circuit-with-two-voltage-sources

 

KVL says that the total sum of all voltages around the loop is equal to zero.
Write out an equation for all voltages knowing that the voltage across a resistor is V = I * R.

 

OK.
You can use what you've already found out and follow the example here: https://electronics.stackexchange.c...ne-analyze-a-circuit-with-two-voltage-sources

I did not know how to complete the solution

 

OK.
You can use what you've already found out and follow the example here: https://electronics.stackexchange.c...ne-analyze-a-circuit-with-two-voltage-sources

Va=38.25 v
Vb=8 v
it is a true ?

 

Do you know how to apply KVL?
Write out the sum of all voltages and equate it to zero.

 

No.
A voltage can only be measured between two points so you can never say 'point A is at 10V' without knowing where the other point is.

 

No.
A voltage can only be measured between two points so you can never say 'point A is at 10V' without knowing where the other point is.

Vab= 3 v
it is true ?

 

Do you know how to apply KVL?
Write out the sum of all voltages and equate it to zero.

He applied it and extracted the current from it 26.25

 

No. Vab is not 3V.
Show your working so we can guide you in the right direction.

 

No. Vab is not 3V.
Show your working so we can guide you in the right direction.

ok wait