Two potentiometer wires `w_(1)` and `w_(2)` of equal length `l` connected to
Channel: Doubtnut
Date: 2020-01-26

Two potentiometer wires `w_(1)` and `w_(2)` of equal length `l` connected to a battery of emf `epsilon_(P)` and internal resistance \'r\' as shown through two switches `s_(1)` and `s_(2)`. A battery of emf `epsilon` is balanced on these potentiometer wires. if potentiometer wire `w_(1)` is of resistance 2r and balancing length on `w_(1)` is `l//2` when only `s_(1)` is closed and `s_(2)` is open. On closing `s_(2)` and opening `s_(1)` the balancing length on `w_(2)` is found to be `((2l)/(3))` then find the resistance of potentiometer wire `w_(2)`