# Can anyone help with thevenins and nortons theorem

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#### keatescarn

##### New Member
I am trying to do a text book question on networks,

the question is ,, use thevenins and nortons theorem to determine the current flowing and the voltage across RL in the network diagram,

i have attatched the diagram.

Thanks for the help

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#### MikeMl

##### Well-Known Member
I'm not doing your homework. Try reducing all but RL to its Thevenin's equiv. circuit.

##### Banned
I've never tried to reduce a circuit before and I'm pretty sure I could do it, which means you certainly can.
Thévenin's theorem - Wikipedia, the free encyclopedia
Provides many examples of how to calculate the Thevenin equivilent on circuits more complicated than what you linked.

#### unclejed613

##### Well-Known Member
for thenevin, you reduce the circuit to a single resistor and voltage source, for norton, it's again an equivalent resistor, and a current source equal to the total current. i leave it to you to arrive at the correct answers..... all you need to know here is how to calculate resistors in series or parallel, and how to calculate the current.

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#### Miles Prower

##### Member
I am trying to do a text book question on networks,

the question is ,, use thevenins and nortons theorem to determine the current flowing and the voltage across RL in the network diagram,

i have attatched the diagram.

Thanks for the help
It's just a simple voltage divider. You don't need either theorem to find the answer to that one.

#### ljcox

##### Well-Known Member
I am trying to do a text book question on networks,

the question is ,, use thevenins and nortons theorem to determine the current flowing and the voltage across RL in the network diagram,

i have attatched the diagram.

Thanks for the help
For the Thevenin voltage, calculate the voltage across the points where RL is connected with RL removed.

For the Thevenin resistance, remove the voltage source(s) and replace it (them) with a short circuit. Replace any current sources with an open circuit.Then calculate the resultant resistance. Imagine that you connected an Ohm meter across across the points where RL is connected with RL removed. The reading would be the Thevenin resistance.

For Norton, calculate the short circuit current. This is the Norton current. Calculate the resistance as I said above.

Once you have the equivalent circuits, it is then easy to calculate the currents & voltages.

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