Consider an electrical circuit containing a two way switch 'S'. Initially S is open and then T1 is connected to T2. As the current in R = 6$\Omega attains a maximum value of steady state level, T1 is disconnected from T2 and immediately connected to T3. Potential drop across r = 3\Omega$ resistor immediately after T1 is connected to T3 is __________ V. (Round off to the Nearest Integer)
Choose the correct answer: