(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

ε[1]=12v

internal resistance[1]=.016Ω

ε[2]=12v

internal resistance[2]=.012Ω

some unknown resistance 'R' in a stand alone resistor.

a) what value of 'R' will make the terminal-to-terminal potential difference of one of the batteries zero?

b) which battery would it be?

(picture below shows circuit)

2. Relevant equations

R = V/i

3. The attempt at a solution

I put together this equation:

ε[2] - ir[2] + ε - ir[1] - iR = 0

and continued to simplify to this:

i(.028 + R) = 24

The problem is I don't have a way to find 'i'...

Any ideas? This problem is marked as a three dot (harder difficulty) in my book, so I'm guessing there's an assumption I'm missing.

Thanks in advance,

Caleb

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# Homework Help: Stuck on a single loop circuit, two emfs and resistor

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