Hey, I'm revising for my summer exams, and gotten stuck on this particluar question.(adsbygoogle = window.adsbygoogle || []).push({});

_______ 6V ______2.0 ohms___

I I

A I I

I I

I_____4.0 ohms______________ I

I C I

I I

B I I

I I

I________1.5V_______________I

SORRY I HOPE THIS CIRCUIT IS READABLE

Question

The 6V cell has a 2ohm internal resistance...The 1.5V cell has a 1ohm internal resistance. Work out the currents A, B and C!

I have split the circuit into two series circuits to make it easier for me

okay....as V=IR

6V = (C x 4ohms) + (A x 2ohms) + (internal resistance - A x 2ohms)

6V = (C x 4) + (A x 4)

......and for the other series circuit

1.5V = (C x 4ohms) + (internal resistance - B x 1ohm)

1.5V = (c x 4) + B

errr....now i'm stuck ....have i made a mess of trying to work this out....or do i need to use simultanous equations to work it out. I haven't a clue!

Please Help!

Thanx

James

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# Homework Help: Internal Resistance and Circuits

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