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In a House Two 60 W Electric Bulbs Are Lighted for 4 Hours, and Three 100 W Bulbs for 5 Hours Every Day. How Much is the Electric Energy Consumed During the Month of June? - Physics

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Question

In a house two 60 W electric bulbs are lighted for 4 hours, and three 100 W bulbs for 5 hours every day. How much is the electric energy consumed during the month of June?
Numerical

Solution

Case (i) Energy consumed by two bulbs per day

= 2 x `60 /1000` x 4= 0.48 kWh

Case (ii) Energy consumed by three bulbs per day

= 3 x `100/1000` x 5 = 1. 5 kWh

:. total energy consumed per day = 0.48 + 1.5 = 1.98 kWh
Required consumption of electrical during the month of June (30 days)=
= 1.98 x 30 = 59.4 kWh

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Chapter 4: Current Electricity - Exercise 4.2 iii [Page 189]

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Frank Physics - Part 2 [English] Class 10 ICSE
Chapter 4 Current Electricity
Exercise 4.2 iii | Q 5 | Page 189

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