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In a mixed grouping of identical cells, ...

In a mixed grouping of identical cells, five rows are connected in parallel and each row contains 10 cells. This combination sends a current I through an external resistance of `20Omega.` if the emf and internal resistance of each cell is 1.5 V and `1 Omega,` respectively then find the value of I.

A

5/22 A

B

15/22 A

C

3/7 A

D

5/9 A

Text Solution

Verified by Experts

The correct Answer is:
B
The number of cells in a row is n =10, and the number of such rows is m =5.
`I = (nE)/((R +(nr)/(m))) = (10xx1.5)/((20 + (10xx1)/(5))) = (15)/(22) = 0.68`
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