Advertisements
Advertisements
Question
An electric heater is rated 220 V, 550 W. Electrical energy is also measured in kWh. What do you understand by a kilo-watt-hour?
Advertisements
Solution
The energy consumed in a resistor when the potential difference is 1V and 1A current flows for 1000 hrs.
RELATED QUESTIONS
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
Name the physical quality which is measured in
(i) Kw (ii) kWh
Distinguish between kilowatt and kilowatt-hour.
What is wrong with the circuit diagram (Fig. 34)? Carefully check the symbols and assign proper positive and negative signs to them.
Express watt hour and kilowatt hour in joule.
‘The current rating of a fuse is 5A’. Comment on this statement.
Unit of electric power may also be expressed as:
A fuse is rated 5 A. Can it be used with a geyser rated 1540 W, 220 V Write Yes or No. Give supporting calculations to justify your answer.
