Advertisements
Advertisements
प्रश्न
Define 1 kilowatt hour.
Advertisements
उत्तर
Kilowatt hour
1 Kilowatt hour is the energy consumed when 1 kilowatt of power is used for 1 hour
1 kwh = `1000 "watt" xx 36000 "second"`
= `3.6 xx 10^6` watt second
= `3.6 xx 10^6` Joule (J)
APPEARS IN
संबंधित प्रश्न
What determines the rate at which energy is delivered by a current?
An electric lamp is labelled 12 V, 36 W. This indicates that it should be used with a 1 V supply. What other information does the label provide?
At a given time, a house is supplied with 100 A at 220 V. How many 75 W, 220 V light bulb could be switched on in the house at the same time (if they are all connected in parallel)?
Two bulbs are rated 60 W, 220 V and 60 W, 110 V respectively. Calculate the ratio of their
resistances
An electric kettle is rated 2.5 kW, 250 V. Find the cost of running the kettle for two hours at Rs. 5.40 per unit.
What is electric power? State and define its S.I. unit.
What changes in energy occur in an electric bulb?
Give two precautious that you would take while putting off an electric switch.
How is the amount of heat produced calculated due to the passage of current in a metallic conductor? Derive an expression for it.
An electric kettle is rated 3kW, 250V. What should be the current capacity of the fuse with it?
