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Two tangent galvanometers differ only in...

Two tangent galvanometers differ only in number of turns in the coil. For same current deflection in them is `45^@` and `35^@` respectively. Find ratio of number of turns of galvanometers.

A

`7 : 10`

B

`10 : 7`

C

`7 : 1`

D

`1 : 7`.

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