In the potential circuit shown, the length of potential wire AB is 400cm long and resistance per unit length is 0.2Omega//cm. If a battery of e.m.f.E and internal resistance r is connected across XY as shown. Then for given circuit if key is closed.

In the potential circuit shown, the length of potential wire AB is 400

1.	In the potential circuit shown, the length of potential wire AB is 400cm long and resistance per unit length is 0.2Omega//cm. If a battery of e.m.f.E and internal resistance r is connected across XY as shown. Then for given circuit if key is closed.
Answer» `E=2V,r=16Omega`balanced point would not exist on potential wire E=1V, and `r = 25 Omega`, balancedpoint is at 250 cm from A We can not compare e.m.f.'s of two BATTERIES which are GREATER than 1.6 volt usingthis potentiometer All of the above SOLUTION :Potential gradient `=(4xx10^(-3))` volt/cm Maximum readable voltage = 1.6 volt.

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In the potential circuit shown, the length of potential wire AB is 400cm long and resistance per unit length is 0.2Omega//cm. If a battery of e.m.f.E and internal resistance r is connected across XY as shown. Then for given circuit if key is closed.

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