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A galvanometer having 20 division scale ...

A galvanometer having 20 division scale and `50Omega` resistance is connected in series to a cell of e.m.f. `1*5V` through a resistance of `100Omega`, shows full scale deflection. The figure of merit of the galvanometer in microampere/division is

A

`330`

B

`660`

C

`500`

D

`600`

Text Solution

Verified by Experts

The correct Answer is:
C
`I=nk=(E)/(R+G)`
or `k=(E)/(n(R+G))`
`k=(1*5)/(20(100+50))=0*5xx10^-3A//"div"`
`=500xx10^6A//"div"`
`=500muA//"div"`
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