Question

An Electric toaster draws current 8 A in a circuit with source of voltage 220 V. It is used for 2 h. Find the cost of operating the toaster if the cost of electrical energy is Rs. 4.50 per k Wh.

Answer 1

$V=220VI=8At=2hE=VIt=220\times 8\times 2=3520Wh=3.52kWh$

Cost of electrical energy $=Rs.4.5\times 3.52=Rs.15.84$