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प्रश्न
The range of an ammeter of resistance 'G can be increased from 'l' to 'nl' by connecting.
पर्याय
a series resistance of `"G"/("n + 1") Omega`
a shunt of `"G"/("n - 1") Omega`
a shunt of `"G"/("n + 1") Omega`
a series resistance of `"G"/("n - 1") Omega`
MCQ
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उत्तर
a shunt of `"G"/("n - 1") Omega`
Explanation:
The range of an ammeter can be increased by connecting a shunt or parallel resistance to it, whose value is given by
R = `("l"_"g"/("l" - "l"_"g")) "G" Omega` ....(i)
To increase the range from Ito nl, the current passing through it is I = nlg
Using this value in Eq. (i), we get
R = `("l"_"g"/("n" "l"_"g" - "l"_"g"))"G"`
`= "G"/("n - 1") Omega`
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