A house has the following appliances whose on/off schedules for one day are given in…
PHYSICS · Subjective · AP · Physics 2: Algebra-based · Electric Circuits · Electric Circuits
Problem
A house has the following appliances whose on/off schedules for one day are given in Table 2.
Table 2
Appliance Power
• Geyser 2.0 kW On from 05 00 h to 05 30 h and 18 00 h to 18 20 h
• Iron 1.0 kW On from 07 00 h to 07 30 h and 19 00 h to 19 40 h
• Refrigerator 0.15 kW Runs continuously
• LED lights 0.10 kW On from 18 30 h to 23 30 h
(i) Draw a neat time-line (05 00 h to 24 00 h) showing the total instantaneous power demand of the house.
(ii) From the graph or otherwise, determine the peak load during the day.
(iii) Calculate the total electrical energy consumed in the 24 h period in kWh.
(iv) Compute the average load for the day and verify that average load×24h equals the energy obtained in part (iii).