To calculate the energy done in 5 minutes, we need to first calculate the power dissipated by the circuit. We can use the formula:
Power = Voltage * Current
Plugging in the values we have:
Power = 12V * 1.2A
Power = 14.4W
Next, we can use the formula for energy:
Energy = Power * time
Plugging in the values we have:
Energy = 14.4W * (5 minutes * 60 seconds/minute)
Energy = 4320 Joules
Therefore, the energy done by the circuit in 5 minutes is 4320 Joules.