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प्रश्न
An ammeter of resistance R gives a full-scale deflection when a current of 2 A passes through it. If it is measured with a maximum current of 10 A, the required shunt is ______.
विकल्प
R
`"R"/2`
`"R"/4`
2R
MCQ
रिक्त स्थान भरें
उत्तर
An ammeter of resistance R gives a full-scale deflection when a current of 2 A passes through it. If it is measured with a maximum current of 10 A, the required shunt is `underlinebb("R"/4)`.
Explanation:
Given, l = 2A, lmax = 10A
Since, shunt resistance, S = `(lR)/(l_"max" - l)`
= `(2R)/(10 - 2) = 2/8R = 1/4R`
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