Electrical Circuit Theory and Technology 6th Edition by John Bird

تمرين 5

A current of 12 A flows in the element of an electric fire of resistance 25 . Determine the power dissipated by the element. If the fire is on for 5 hours every day, calculate for a one week period (a) the energy used, and (b) cost of using the fire if electricity cost 13.5p per unit.