An apartment complex is considering two tariff plans offered by its electricity…

PHYSICS · Subjective · CBSE · Physics · Current Electricity · Current Electricity

Problem

An apartment complex is considering two tariff plans offered by its electricity provider for a typical summer month of 30 days. Plan A: Flat charge of Rs.

6.50

per unit with no fixed fee. Plan B: Fixed meter charge of Rs.

2000

for the month plus Rs.

5.25

per unit. The complex expects to run the following equipment: • Central water pumps:

4\,\text{kW}

for

3\,\text{h}

daily • Corridor lighting: twenty lamps of

40\,\text{W}

each for

8\,\text{h}

daily • Common-area air-handling unit:

3\,\text{kW}

for

6\,\text{h}

daily (a) Compute the total electrical energy to be consumed in the month in kilowatt-hours. (b) Calculate the expected payment under each plan. (c) Decide which plan is more economical and by how much, showing all working.

Related theory

Electric Power
Electrical power and energy
Electricity
Electrical energy and power
Current Electricity

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