Page 40 - CHAPTER-1 (Electricity)
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CHAPTER 1
ELECTRICITY
Note:
1. Bigger units of power are as given below:
3
a. 1 kilowatt (kW) = 10 W
6
b. 1 megawatt (MW) = 10 W
9
c. 1 gigawatt (GW) = 10 W
2. The practical unit of power is horse power.
1 HP = 746W
3. Commercial unit of electrical energy
1kWh = 1000 Wh
= 1000 × 3600 Ws
= 3.6 × 10 Ws = 3.6 × 10 J
6
6
4. Number of units consumed by electric appliances is
watt×hours
=
1000
Do you know?
Are electrons consumed in an electric circuit?
Answer: No, electrons are not consumed in an electric circuit. We pat
the electricity board or electric company to provide energy to move
electrons through all the electric gadgets like a fan, bulb, refrigerator,
etc. installed in our homes. We pay for the electrical energy that we
use.
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