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Question

The number of joules that is equal in value to 1 kWh is.
  1. 3.6×108
  2. 0.36×104
  3. 3.6×105
  4. 3.6×106

A
3.6×106
B
3.6×108
C
0.36×104
D
3.6×105
Solution
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1 kWh is equal to 3.6 × 106

1 Watt-sec is a Joule a watt expended for a second.

Because there’s 3600 seconds in an hour,

then 3600 Ws = 1 Wh = 3600 Joules = 3.6 kJ

so 1000 Wh = 1 kWh = 1000 × 3.6 kJ = 3.6 MJ = 3.6 × 106

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Q1

Number of joules in 1 kWh is


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Q2
In the video, they said that 1kwh is equal to 3.6*109 J

But, in the question and answer, they said that 1 kwh=3.6*106 J.
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Q3
I the chapter 'electricity', the cideo regarding electric power states that 1kwh=3.6x10^9 Joules. But it is actually 1kwh=3.6x10^6 Joules. It is also on the internet. Please take this issue to your notice.
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Q5
Show that 1 kWh=3.6×106 J.
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