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.

Two batteries of emf 12V and 6V and internal resistance 2Omega and 1Om

1.	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.
Answer» ANSWER :a) 8V, b) 6V, C)8V, 0.67 `OMEGA`

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