Figure shows a 2.0 V potentiometer used for the determination of internal resistance of 1.5 V cell. The balance point of the cell without 9.5 Ω Ω in the external circuit is 70 cm. When a resistor of 9.5 Ω Ω is used in the external circuit of the cell, the balance point shifts to 60 cm length of the potentiometer wire. Determine the internal resistance of the secondary cell.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
( 
ohm]
Sol. r = 
= 9.5 
= 9.5 
= 
Ω Ω
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