Re: SPecific charge - physics homework
Original post by jack_ray13
EXPLAIN THIS SORCERY TO ME HOW DOES THE r = 12 the person in the video said it does due to kirchoffs second law but Kirchoffs second law tells us that the sum of volts in the circuit is equivalent to the supply pd
Just in case, you still need some form of reply.
Have you written out the equation using the Kirchhoff voltage law/rule? If yes, you should be able to see that there is only one unknown variable, the internal resistance r.
"Another way" is using Ohm's law/rule.
The current in the battery is also the current in the internal resistance and the total current in the external circuit.
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