Given that, Voltage = 230 V Current = 4 A cos ϕ = 1 Energy consumed in 6 hours is given as, E1=230×4×6×1=5520Wh R1=2208 From above concept, R∝E ∴R1E2=R2E1 Given, R2=1240 Hence, E2=
R2E1
R1
=
1240×5520
2208
=3100Wh Hence, the Energy consumed in 1240 revolution is 3.1 kWh.