In the primary circuit of potentiometer the rheostat can be varied from 0 to \(10 \Omega\). The....

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In the primary circuit of potentiometer the rheostat can be varied from 0 to \(10 \Omega\).

The rheostat is put at maximum resistance \((10 \Omega)\) and the switch \(S\) is closed. The balancing length is found to be \(8 \mathrm{~m}\). Find the internal resistance \(r\) (in \(\mathrm{m} \Omega\) ) of the \(4.5 \mathrm{~V}\) cell. 📲PW App Link - https://bit.ly/YTAI_PWAP 🌐PW Website - https://www.pw.live



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