# How to calculate thevenin's equivalent resistance

1. Apr 22, 2013

### hussain bani

when i short the batteries to find the rth, i cant get whether is should put delta to star transformation to find thevenines resistance?
can some one tell me how to calculate thevenines equivalent resistance in the figure shown... step by step

Last edited by a moderator: Apr 23, 2013
2. Apr 22, 2013

### phinds

It would help if there were actually a figure

3. Apr 22, 2013

### hussain bani

Thevenine

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4. Apr 22, 2013

### phinds

Why do you think you need a delta/star transform? You have simple series and parallel resistors. The problem reduces to an extraordinarily simple one. You should try redrawing the circuit with the supplies shorted out.

5. Apr 23, 2013

### hussain bani

thevenine

so whT WILL BE nswer after shorting them and finding thevenine equivalent reistance across terninal a and b?
mine is coming 1.33 ohms, is it rite?

6. Apr 23, 2013

### phinds

Yes. See how easy that was?

7. Apr 24, 2013

### hussain bani

thevenines

i solved 4 and 2 in parallel, and 10 parallel with ze0r, so automatically ans is 0 of 10 iin parallel with zero, so the only thing left was 4 in parallel with 2, thats is 1.33.
this is correct method right???

8. Apr 24, 2013

### phinds

Yes. See how easy that was?

9. Apr 25, 2013

### hussain bani

thevenines

yeah got it.. thanks alot..:-)