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Q.

Three equal resistance each of 3 Ω are in series and connected to cell of internal resistance one ohm. If three resistances are parallel and connected to the same cell. Then the ratio of the respective currents through the electric circuits in the two cases is

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a

1/3

b

1/5

c

1/8

d

1/7

answer is C.

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Detailed Solution

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i1=Er+3R;i2=Er+R/3;i1i2=E/10E/2=1/5

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