Two batteries of emf 12V and 6V and internal resistance `2Omega` and `1Omega` are connected in parallel and the combination is connected to a resisor
Two batteries of emf 12V and 6V and internal resistance `2Omega` and `1Omega` are connected in parallel and the combination is connected to a resisor of `2Omega` through a key. Find the potential difference between the positive and negative terminals of the batteries (a) When key is open, b) when key is closed. Find the emf and internal resistance of a single cell which would be equivalent to the combination.
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