A resistance of 2 Ω Ω is connected across one gap of a meter-bridge (the length of the wire is 100 cm) and an unknown resistance, greater than 2 Ω Ω , is connected across the other gap. When these resistances are interchanged, the balance point shifts by 20 cm. Neglecting any corrections, the unknown resistance is
Text Solution
Verified by ExpertsThe correct answer is:
A
… ..(i)
… .(ii)
Solving Eqs. (i) and (ii), we get, 
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