Figure 3.34 shows a potentiometer circuit for comparison of two resistances. The balance point with a standard resistor R =10.0Ω  is found to be 58.3 cm, while that with the unknown resistance X is 68.5 cm. Determine the value of X. What might you do if you failed to find a balance point with the given cell of emf ε ?

Figure 3.34 shows a potentiometer circuit for comparison of two resistances. The balance point with a standard resistor R =10.0Ω  is found to be 58.3 cm, while that with the unknown resistance X is 68.5 cm. Determine the value of X. What might you do if you failed to find a balance point with the given cell of emf ε ?

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