Question

identical cells, each of internal resistance are first connected in parallel and then connected in series across a resistance . If the current through is same in both the cases then: 

A

B

C

D

Medium

Solution

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Correct option is C)

If the emf of each cell be E, then for parallel connection, equivalent emf is 


And equivalent internal resistance of the cells,

So net current in parallel connection is


And for series connection of cells, eqv emf ,

and equivalent internal resistance for series,

So current ,

Now according to question, both the currents are equal.

So, reduces to which gives

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Solution To Question ID 5500
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