Two tangent galvanometers, which are identical except in their number of turns, are connected in parallel. The ratio of their resistances of the coils is 1 : 3 . If the deflections in the two tangent galvanometers are 30^ and 60^ respective

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Two tangent galvanometers, which are identical except in their number of turns, are connected in parallel. The ratio of their resistances of the coils is 1 : 3 . If the deflections in the two tangent galvanometers are 30^ and 60^ respectively, then the ratio of their number of turns is

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Correct answer: D. 1: 6

We know that the current passing through galvanometer coil is I=K where K= 2 r B_ H n ₀ Here, I₁=K₁ ₁ and I₂=K₂ ₂ or l₁ I₂ = K₁ ₁ K₂ ₂ = 2 r B_ H n₁ ₀ ₁ 2 r B_ H n₂ ₀ ₂ R₂ R₁ = n₂ 30^ n₁ 60^ 3 1 = n₂ n₁ 3 3 ( I= V R ) n₁ n₂ = 1 3

Two tangent galvanometers, which are identical except in their number of turns, are connected in parallel. The ratio of their resistances of the coils is 1 : 3 . If the deflections in the two tangent galvanometers are 30^ and 60^ respectively, then the ratio of their number of turns is

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