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प्रश्न
The resistance of an ammeter is 13 Ω and its scale is graduated for a current upto 100 amps. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto 750 amperes by this meter. The value of shunt-resistance is ______.
पर्याय
2 Ω
0.2 Ω
2 kΩ
20 Ω
MCQ
रिकाम्या जागा भरा
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उत्तर
The resistance of an ammeter is 13 Ω and its scale is graduated for a current upto 100 amps. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto 750 amperes by this meter. The value of shunt-resistance is 2 Ω.
Explanation:
We know
`"I"/"I"_"S"=1+"G"/"S"`
`750/100=1+13/"S"`
S ⇒ 2 Ω
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