B1, (i) A domestic lighting installation having 26, 75 W lamps is operated as follows: 8 lamps 6 Pm till 8 pm 12 lamps 8 pm till 10 pm 3 lamps 10 pm till 11.45 pm Determine the demand factor and...

Extracted text: B1, (i) A domestic lighting installation having 26, 75 W lamps is operated as follows: 8 lamps 6 Pm till 8 pm 12 lamps 8 pm till 10 pm 3 lamps 10 pm till 11.45 pm Determine the demand factor and monthly load factor. Demand factor DF= Daily load factor , LF = B1 (i) A typical electric-powered car having a 4 A, 18 V battery was charged at constant current from 8am till 10pm. Determine: (i) How much electric energy is used? (ii) What is the cost of electricity to charge the battery? (ii) Calculate the total energy conversion loss. (iv) What is the actual efficiency of the battery? [Data given: electric cost = $0.48/Wh, * and assuming 65% battery (chemical energy) to electricity conversion, and 70% electrical to mechanical energy conversion].