A 6.0 V battery has an internal resistance r. The measured voltage (emf of the battery) is 6.0 V. When connected to a resistor R the terminal voltage is 5.9 V and the current is 0.18 A.(adsbygoogle = window.adsbygoogle || []).push({});

I managed to get a) What is the internal resistance r of the battery?

0.556 ohm

as well as b) What is the value of the external resistor R?

32.78 ohm

but i cant figure out what to do when they ask me

c) What is the energy dissipated inside the battery in 4.4 minutes?

and d)When a second identical battery is added in series and the external resistor is R = 29 Ohms what is the resulting current?

Please help me. I have been trying this for an hour!

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# Batteries and Internal resistance

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