In a large building, there are 15 bulbs of 40W, 5 bulbs of 100W, 5 fans of 80W and 1 heater of 1kW. The voltage of the electric mains is 220V. The minimum capacity of the main fuse of the building will be

Engineering

Physics

Heating Effects of Current and Electric Power

Question

10 A

12 A

14 A

8 A

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P = Vi

$i = \frac{40 \times 15}{220} + \frac{100 \times 5}{220} + \frac{80 \times 5}{220} + \frac{1000}{220}$

$= \frac{125}{11} = 11 A$