Register To Attempt Complete Test
Two identical potentiometer wires w1 and w2 of equal length l, connected to a battery of emf εP and internal resistance 1Ω through two switches s1 and s2. A battery of emf ε is balanced on these potentiometer wires one by one. If potentiometer wire w1 is of resistance 2Ω and balancing length is l/2 on it, when only s1 is closed and s2 is open. On closing s2 and opening s1 the balancing length on w2 is found to be (2l/3), then find the resistance of potentiometer wire w2.