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प्रश्न
In the given figure, battery E is balanced on 55 cm length of potentiometer wire but when a resistance of 10 `Omega` is connected in parallel with the battery, then it balances on 50 cm length of the potentiometer wire. The internal resistance r of the battery is ____________.
विकल्प
`1 Omega`
`3 Omega`
`10 Omega`
`5 Omega`
MCQ
आकृति
रिक्त स्थान भरें
उत्तर
In the given figure, battery E is balanced on 55 cm length of potentiometer wire but when a resistance of 10 `Omega` is connected in parallel with the battery, then it balances on 50 cm length of the potentiometer wire. The internal resistance r of the battery is `1 Omega`.
Explanation:
`"r" = ((l_1 - l_2)/l_2) xx "R'"`
`therefore "r" = ((55 - 50)/50) xx 10`
`= 1 Omega`
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Potentiometer
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