Thevenin Equivalent Explanation Request~

[nobodyuknow]

Homework Statement

http://img507.imageshack.us/img507/6493/f7868b61c6cb4d6084fa5ba.png

Homework Equations

The Attempt at a Solution

I've tried to deduct how my textbook has actually done this Thevenin Equivalent. No one in my class (that I've come into contact with anyway) actually has a clue about this, and we don't have lectures/tutorials for 3 weeks.

This isn't a homework question, but is a smaller part to another question we are expected to do.

This was taken from a textbook.

So if possible, my classmates and I would really appreciate it if you could explain the process in how they've transformed that first part of the circuit.

Thanks!

 

[phinds]

Doesn't your text explain how to get a Thevenin equivalent?

There's this really neat facility on the internet called Google Search. You should learn how to use it.

http://www.facstaff.bucknell.edu/mastascu/elessonsHTML/Source/Source2.html

EDIT: also, see this: https://www.physicsforums.com/blog.php?b=3588

 

[hogrampage]

Use a source transformation and then you can find the equivalent resistance (25ohm and 100ohm resistors are in parallel).

Then, using another source transformation, you find the voltage. Finally, the equivalent resistance of the 25ohm and 100ohm resistors are in series with the 10ohm resistor after the second source transformation.