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प्रश्न
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उत्तर
Watt-hour is the commercial unit of electrical energy.
One watt-hour is the electrical energy consumed by an electrical appliance of power 1 watt when it is used for 1 hour.
1Wh = 3600 J
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संबंधित प्रश्न
How many milliamperes as there in 1 ampere?
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Two lamps, one rated 40 W at 220 V and the other 60 W at 220 V, are connected in parallel to the electric supply at 220 V.
(a) Draw a circuit diagram to show the connections.
(b) Calculate the current drawn from the electric supply.
(c) Calculate the total energy consumed by the two lamps together when they operate for one hour.
In the network shown in the following adjacent Figure, calculate the equivalent resistance between the points.
- A and B
- A and C

The diagram shows two ways of connecting three lamps P, Q and R to A.C. supply of 220 V.


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