Advertisements
Advertisements
प्रश्न
An electric bulb is rated ‘100 W, 250 V’. What information does this convey?
Advertisements
उत्तर
It means that if the bulb is lighted on a 250 V supply, it consumes 100 W electrical power, (which means 100 J of electrical energy is converted in the filament of the bulb into light and heat energy in 1 second).
APPEARS IN
संबंधित प्रश्न
The unit for expressing electric power is:
(a) volt
(b) joule
(c) coulomb
(d) watt
Name the S.I. unit of electrical energy. How is it related to Wh?
What does the unit kilowatt hour measure? Define it.
How does earthing prevent electrical shock?
Three 250 W heaters are connected in parallel to a 100 V supply, Calculate total current taken from the supply.
Find the cost of operating an electric toaster for two hours if it draws 8 A current on a 110 volt circuit. The cost of electrical energy is Rs. 2.50 per kWh.
What is the commercial unit of electrical energy?
