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## Homework Statement

Find the voltage and the current through R5

http://i.imgur.com/bL9AFVo.jpg?1

## Homework Equations

Thevenin's theorem.

## The Attempt at a Solution

http://i.imgur.com/Lz9k8l2.jpg?1

* To find Vth:

1- Open circuit R5.

2- Find the voltage at A and B by determining the current through R1, R2, R3 and R4 (Their Req=(R1+R4)//(R2+R3)=368.4 ohms

3- The current is equal to 0.24 A, hence the Vab=Vth=30V

http://i.imgur.com/Lz9k8l2.jpg?1

* To find Rth (=Rab):

1- Open circuit R5 and short circuit the voltage source.

2- (R1+R4)//(R2+R3)=368.4 ohms

My problem is here, does the wire (caused by short circuiting the source) cause short on (R1+R4)?

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