Potential difference in junction of two cells one 4.5V and one 3V

AI Thread Summary
When connecting a 4.5V cell and a 3V cell in parallel, the potential difference across the junctions cannot be determined as it is unsafe and impractical to connect cells of differing voltages this way. The discussion highlights that the higher voltage cell (4.5V) would dominate, but the cells should not be connected directly due to the risk of short circuits or fire. Clarification is needed regarding the term "junctions between them" and whether a visual representation accompanies the question. Overall, the scenario presents a fundamental misunderstanding of electrical connections. Proper safety protocols must be followed when working with batteries.
alexratman
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1. If two cells, one of 4.5V and one of 3V are connected in parallel what is the potential Difference across the junctions between them.
2. I = \frac{V}{R}
3. As 4.5v is greater it is the potential difference as they don't add up?
 
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alexratman said:
1. If two cells, one of 4.5V and one of 3V are connected in parallel what is the potential Difference across the junctions between them.



2. I = \frac{V}{R}



3. As 4.5v is greater it is the potential difference as they don't add up?

Welcome to the PF.

As stated, the problem doesn't make sense yet. You wouldn't connect two batteries of different voltages in parallel directly -- that's a good way to start a fire.

What are "the junctions between them"? Is there a figure that goes with this question?
 

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