JEE Main 27 July 2021 Shift 1 Solved Paper

Consider an electrical circuit containing a two way switch ' S′. Initially S is open and then T1 isconnected to T2. As the current in R=6Ω attains amaximum value of steady state level, T1 is disconnected from T2 and immediately connectedto T3. Potential drop across r=3Ω resistorimmediately after T1 is connected to T3 is _____V.
(Round off to the Nearest Integer)