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Q.

How many cells each marked (6V -12A) should be connected in mixed grouping so that it may be marked (24V -24A)

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a

4

b

8

c

12

d

6

answer is B.

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Detailed Solution

Number of rows = required current  Given current =24A12A=2=mNumber of cells in each row= requried potential  Given potential =246=4=n∴ Total no of cells = n x m2 x 4 = 8
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How many cells each marked (6V -12A) should be connected in mixed grouping so that it may be marked (24V -24A)