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
Which of the following terms does not represent electrical power in a circuit?
What is consumed using different electrical appliances, for which electricity bills are paid?
An electric kettle connected to the 230 V mains supply draws a current of 10 A. Calculate:
(a) the power of the kettle.
(b) the energy transferred in 1 minute.
Which of the following is likely to be the correct wattage for an electric iron used in our homes?
(a) 60 W
(b) 250 W
(c) 850 W
(d) 2000 W
Water in an electric kettle connected to a 220 V supply took 5 minutes to reach its boiling point. How long would it have taken if the supply voltage had fallen to 200 V?
An electric toaster draws 8 A current in a 220 V circuit. It is used for 2 h. Find the cost of
operating the toaster if the cost of electrical energy is Rs. 4.50 per kWh.
A geyser is rated 1500 W, 250 V. This geyer is connected to 250 V mains. Calculate:
(i) the current drawn
(ii) the energy consumed in 50 hours, and
(iii) the cost of energy consumed at Rs. 4.20 per kWh
A cooler of 1500 W, 200 volts and a fan of 500 W, 200 volts are to be used from a household supply. The rating of fuse to be used is:
