# problem

Discussion in 'Homework Help' started by jo-jo2004, Dec 11, 2010.

1. ### jo-jo2004 Thread Starter New Member

Dec 11, 2010
14
0
hello

i want to solve this problem as soon as ,please

Regards

2. ### hgmjr Retired Moderator

Jan 28, 2005
9,030
218
What have you been able to do so far?

hgmjr

jo-jo2004 likes this.
3. ### Georacer Moderator

Nov 25, 2009
5,177
1,285
This is a very nice example of the theorem of supperposition. Do you know about it?

jo-jo2004 likes this.
4. ### jo-jo2004 Thread Starter New Member

Dec 11, 2010
14
0
thanx hgmjr and georacer

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

5. ### Georacer Moderator

Nov 25, 2009
5,177
1,285
jo-jo2004 likes this.
6. ### hgmjr Retired Moderator

Jan 28, 2005
9,030
218
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

jo-jo2004 likes this.
7. ### jo-jo2004 Thread Starter New Member

Dec 11, 2010
14
0
I know this method
But in the question, there is no R value unknown??
How do I find??

8. ### retched AAC Fanatic!

Dec 5, 2009
5,201
316
You do not need R.

Forget R.

You do not need R to solve this.

jo-jo2004 likes this.
9. ### jo-jo2004 Thread Starter New Member

Dec 11, 2010
14
0
How??? Please solve the question to me

10. ### jo-jo2004 Thread Starter New Member

Dec 11, 2010
14
0
How??? Please solve the question to me

11. ### thatoneguy AAC Fanatic!

Feb 19, 2009
6,357
727
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.

jo-jo2004 likes this.
12. ### jo-jo2004 Thread Starter New Member

Dec 11, 2010
14
0
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

13. ### jo-jo2004 Thread Starter New Member

Dec 11, 2010
14
0
i have Known solution to this question
Thanks you everyone
My greetings to you

14. ### thatoneguy AAC Fanatic!

Feb 19, 2009
6,357
727
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.

jo-jo2004 likes this.