Question

1. Calculate the electrical energy consumed by a 1200 W toaster in 30 minutes.
2. What will be the cost of using the same for 1day if one unit of electricity costs Rs.4

Answer 1

power=energy*time
         = 1200*30/60
          = 600Wh
 cost= power * cost
      = 600*4
      =rs.2400

Answer 2

E=P*T

E = 60*30 * 60

E= 1800*60

E= 108000 J

Explanation: