Question

calculate the electrical energy consumed in joules if atoaster of 60 watt is used for 30 minutes​

Answer 1

Time = 0.5 hour
Power = 60 watt
Therefore,
Electrical energy consumed = Power * time
= 60(0.5) = 30 Watt hours = 0.03 kilowatt hours = 0.03 units
To convert your answer into Joules
Multiply the kWh value * 3.6*10^6 Joules

So,
Energy = 0.03 * 3.6 * 10^6 Joules

Answer 2

hope this helps you