hello

i want to solve this problem as soon as ,please

Regards

 

What have you been able to do so far?

hgmjr

 

This is a very nice example of the theorem of supperposition. Do you know about it?

 

thanx hgmjr and georacer

How do I find the resistanceHow do I find the resistance R ??

 

Depending on which source you examine each time, you have a different configuration.

Take a look here for an example: http://www.allaboutcircuits.com/vol_1/chpt_10/7.html

 

How do I find the resistanceHow do I find the resistance R ??

You do not need to know the value of R in this circuit. Since it is in parallel with a voltage source, it will not effect the value of the voltage Vx.

hgmjr

 

Depending on which source you examine each time, you have a different configuration.

Take a look here for an example: http://www.allaboutcircuits.com/vol_1/chpt_10/7.html

I know this method
But in the question, there is no R value unknown??
How do I find??

 

You do not need R.

Forget R.

You do not need R to solve this.

 

You do not need to know the value of R in this circuit. Since it is in parallel with a voltage source, it will not effect the value of the voltage Vx.

hgmjr

How??? Please solve the question to me

 

You do not need R.

Forget R.

You do not need R to solve this.

How??? Please solve the question to me

 

How??? Please solve the question to me

To find Vx, you only need to know the current flowing through the 5Ω resistor.

R doesn't matter, as the voltage across R is 10V. That value is needed for the voltage on the left side of the top resistor.

Check out the links given above, giving you the answer to this question will not help you at all if the resistors change, or the current source and voltage source are switched around for the test.

 

To find Vx, you only need to know the current flowing through the 5Ω resistor.

R doesn't matter, as the voltage across R is 10V. That value is needed for the voltage on the left side of the top resistor.

Check out the links given above, giving you the answer to this question will not help you at all if the resistors change, or the current source and voltage source are switched around for the test.

ok, but What is the current passing through the resistance 5??

Current in the resistance 5 of voltage source and current source , right??
And how I find??

They gave me the solution please my exam tomorrow

 

i have Known solution to this question
Thanks you everyone
My greetings to you

 

ok, but What is the current passing through the resistance 5??

Current in the resistance 5 of voltage source and current source , right??
And how I find??

They gave me the solution please my exam tomorrow

The current through R WILL add to the total current being used by the circuit, but that current doesn't matter when calculating Vx (the current through the 5 Ohm).

Hopefully that was explained to you in class.