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Q.

Define 1KWh. Give the relation between 1KWh and Joule.


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a

It is the unit of energy

b

The amount of energy consumed by the electric appliance with the help of the power.

c

It is a kilowatt hour.

d

It is used for commercial purposes. 

answer is B.

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Detailed Solution

Concept: It is the energy which is used by the electrical appliance with the help of power. This is mostly used for commercial purposes. The relationship is about the power , energy and time
P=E/t
The full form of kWh is kilowatt hour .
P= power
E= energy
t=time
E=Pt
P=1000 watts
t=1 hour
 = 60×60
 =3600 sec.
E=1000×3600
  =3.6 ×106 joules
Hence, the correct option is 2.
 
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