A car battery with a 12 V emf and an internal resistance of 0.050 is being charged with a current of 60 A.(adsbygoogle = window.adsbygoogle || []).push({});

(a) What is the potential difference V across its terminals?

Okay i have an equation that should work perfectly!!

Points a and b are located at he terminals of the battery, thus the potential difference Vb-Va is the termian to terminal potential difference V across the battery, we see that:

V = EMF - ir. r is the internal resitance of the battery, and they give me 60 amps as the current?

V = (12V)-(60A)(.050) = 9V, which is wrong!

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# Homework Help: What the! isn't this plug and chug?

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