The switch in the circuit shown in the figure has been open for a long time before it closes at t = 0
Which among the following results is/are true:
1
The voltage across R1, R2, and R3 at t = 0+ will be 0, 30 V and 30 V respectively
2
The voltage across R1, R2, and R3 at t = ∞ will be 15 V, 0 V, and 45 V respectively
3
The current across R3 at t = 0+ will be 2 A
4
The current across R1 at t = ∞ will be 1.5 A