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A galvanometer of resistance 50Omega is ...

A galvanometer of resistance `50Omega` is connecter to a battery of 8 V along with a resistance of `3950Omega` in series. A full scale deflection on 30 div is obtained in the galvanometer. In order to reduce this deflection of 15 division, the resistance in series should be ______ `Omega`.

A

1950

B

7900

C

2000

D

7950

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