A potentiometer wire of length 10 m and...| Current Electricity | JEE Main

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JEE MAIN 2022

24-06-22 S2

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A potentiometer wire of length 10 m and resistance $20 \Omega$ is connected in series with a 25 V battery and an external resistance $30 \Omega$. A cell of emf E in secondary circuit is balanced by 250 cm long potentiometer wire. The value of $E$ (in volt) is $\frac{x}{10}$. The value of $x$ is $\_\_\_\_$ .

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