An electric heater, operating from a 220 V network, consumes a current of 5 A. What is the power of the electric

An electric heater, operating from a 220 V network, consumes a current of 5 A. What is the power of the electric heater and how much heat it will release in 2 hours of operation. Give the answer in joules and kilowatt-hours?

Initial data: U (voltage in the network from which the electric heater works) = 220 V; I (current consumed by the electric heater) = 5 A; t (duration of the electric heater) = 2 hours (7200 s).

1) Electric heater power: P = U * I = 220 * 5 = 1100 W (1.1 kW).

2) The amount of heat that the electric heater will emit, in J: Q = P * t = 1100 * 7200 = 7920000 J (7.92 MJ).

3) The amount of heat that the electric heater will emit, in kW * h: Q = P * t = 1.1 * 2 = 2.2 kW * h.