An ammeter has resistance `R_(0)` and range l what resistance should be connected in parallel with it to increase its range by nl ?
An ammeter has resistance `R_(0)` and range l what resistance should be connected in parallel with it to increase its range by nl ?
A. `R_(0)/(n-1)`
B. `R_(0)/(n+1)`
C. `R_(0)/n`
D. none of these
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Correct Answer - C
Given `i_(g)=iG=R_(0),I=ni+i=(n+1)i`
`therefore` shunt `S=(i_(g)G)/(i-i_(g))=(IR_(0))/(n+1)I -i=(r_(0))/(n)`
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