Question

A cell can be balanced against 110 cm and 100 cm of potentieter wire r

Answer 1

A cell can be balanced against 110 cm and 100 cm of potentiometer wire ,respectively with and without being short circuited through a resistance of 10 ohm what is its intrnal resistance? in this type of question how we can know which is L1 ,L2, also solve this question

Answer:
Value of internal resistance = [L1-L2)/L2]*value of the resistance

Hence the value of the resistance = [(110-100)/100]*10 = 1 ohm

Hence the value of the internal resistance is 1 ohm

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