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संबंधित प्रश्न
Which of the following terms does not represent electrical power in a circuit?
How many joules are there in one kilowatt-hour?
Calculate the cost of operating a heater of 500 W for 20 hours at the rate of Rs 3.90 per unit.
List the names of three electrical gadgets used in your house. Write their power, voltage rating and approximate time for which each one is used in a day. Hence, find the electrical energy consumed by each in a day.
‘The current rating of a fuse is 5A’. Comment on this statement.
State two advantages of filling an inert gas in an evacuated electric filament lamp.
Three 250 W heaters are connected in parallel to a 100 V supply, Calculate the energy supply in kWh to the three heaters in 5 hour.
A bulb is marked 100W, 220V and an electric heater is marked 2000 W, 220 V.
(i) What is the ratio between the resistances of these two devices?
(ii) How does the power-voltage rating of a device help us to decide about the type of leads (connecting wires) to be used for it?
(iii) In which of the above two devices, a thicker connecting wire of lead is required?
Electric power is inversely proportional to ____________.
