A family uses 250 units of electrical energy during a month. Calculate this electrical energy in joules.

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250 units of electrical energy means 250 kWh of electrical energy. Now, we know that :
1 kWh of energy $= 3.6 \times 10^{6} J$
So, 250 kWh of energy $= 3.6 \times 10^{6} \times 250 J$
$= 9 \times 10^{8} J$
Thus, 250 units of electrical energy is equal to $9 \times 10^{8}$ joules.

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Updated on:21/07/2023

Class 9 PHYSICS WORK AND ENERGY

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Question 1 - Select One
The commercial unit of electrical energy is
AKilowatt-hour
BKilowatt
CWatt
DJoule
Question 2 - Select One
The commercial unit of electrical energy is ________
AWh
BkWh
CJoule
DNone of these
Question 3 - Select One
The commercial unit of electric energy is
Akilowatt hour hour
B $\frac{kilowatt}{hour}$
C $kilowatt / hour$
D ${kilowatt (hour)}^{2}$

LAKHMIR SINGH & MANJIT KAUR-WORK AND ENERGY-Multiple Choice Questions

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