Question

There are a large number of cells available, each marked(6V,0.5 Ohm)to be used to supply current to a device of resistance 0.75 Ohm, requiring 24 A Current. How should the cells be arranged, so that power is transmitted to the load using minimum number of cells?
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Answer 1

Explanation:

B

Four rows, each containing six cells

Cells and EMF

Power is transmitted to the load if external resistance total internal resistance of all the cells

R=

m

nr

if n cells are in series and there are

′

m

′

rows of cells in parallel

(1) u rows each containing 6 cells is

required answer

because

n=6 & m=4

R=

4

6×0.5

=0.75 ohm

perfect for the transmission at power to the load

.750 ohm