Question

how many kilowatts will be required to light a factory in which 250 lamps each taking 1.3 A at 230 V are used?
Someone explain please

Answer 1

Answer:

74.75 KW

Explanation:

As you want answer in Kilowatt which is a unit of Power. So, we have to find Power.

Data Given:

Volt (Potential Difference)=230V ; No. of Lamps=250; Current carrying each lamp= 1.3 A

Solution:

So, Current carrying by all the 250 lamps = 1.3×250= 325 A ----(i)

Power = V (Volt) × I (Current)

So, Power = 230 × 325 (By i)

Power = 74750 Watt -----(ii)

=>As to convert this at Kilowatt we have to divide (ii) by 1000.

Therefore, 74750/1000 Kilowatt

Therefore, Power = 74.75 KILOWATT.

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