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What do you mean by current sensitivity ...

What do you mean by current sensitivity of a galvanometers ? Write its SI unit.

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1st Part: The basic definition of current sensitivity of an galvanometer is `S_(i)=(d theta)/(dI), theta` being the anuglar deflection of the coil.
2nd Part: AS `theta` dimensionless, the unit of `S_(i)` is `A^(-1)`.
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