Two resistances 1Ω and 3Ω are connected in series and then in parallel. The ratio of the effective resistance of series and parallel combination of resistance is *

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Explanation:

in series combination,

Rs= R1+R2 = 1 +3 = 4ohm

in parallel combination ,

1/Rp = 1/R1 + 1/R2

1/Rp = 4/3

Rp= 3/4

ratio = 4/3/4 = 16:3

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