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प्रश्न
State two factors on which the electrical energy consumed by an electrical appliance depends.
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उत्तर
Two factors on which electrical energy consumed by an electrical appliance depends are:
- power
- time
संबंधित प्रश्न
1 calorie = _________ joule.
Which of the following is the most likely temperature of the filament of an electric light bulb when it is working on the normal 220 V supply line?
(a) 500°C
(b) 1500°C
(c) 2500°C
(d) 4500°C
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.
A bulb of 40 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.
If the rating of an electric bulb is 100W – 230V, Explain its meaning.
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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.
The following table gives the electrical appliances used, their power and the average time for which they are used each day in a home. Estimate the monthly electricity bill if the rate is 60 paise per unit.
| Sr.no. | Name | Nos. | Power rating | Time/day |
| 1 | Bulb | 4 | 100 W | 7.5 hr |
| 2 | Fans | 2 | 50 W | 10 hr |
| 3 | T.V. | 1 | 100 W | 2 hr |
| 4 | Iron | 1 | 500 W | 1 hr |
| 5 | Electric stove | 1 | 750 W | 2 hr |
Unit of electric power may also be expressed as:
