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Two tangent galvanometers P and Q connec...

Two tangent galvanometers P and Q connected in series . The number of turns in P is four times than of Q. When a current is passed through them P shows a deflection of `60^(@)` and Q shows a deflection of `30^(@)`. What is ratio of the radii of the coils of the two tangent galvanometers ?

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The correct Answer is:
`4:3`
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