Advertisements
Advertisements
प्रश्न
State and define the household unit of electricity.
Advertisements
उत्तर
The household unit of electricity is kilowatt-hour (kWh).
One kilowatt-hour (kWh) is the electrical energy consumed by an electrical appliance of power 1 kW when it is used for one hour.
APPEARS IN
संबंधित प्रश्न
The electrical energy consumed in a house is measured by ...............
One kilowatt hour is equal to ............ joule.
For which unit do we pay our electricity bill?
Name the unit in which you pay the cost of your electricity bill. How is it related to joule?
If an appliance of power P watt is used for time t hour. How much electrical energy is consumed in kWh?
Figure shows two ways of connecting the three bulbs A, B and C to a battery. Name the two arrangements. Which of them do you prefer to use in a household circuit? Give a reason to support your answer.


In a premise 5 bulbs each of 100 W, 2 fans each of 60 W, 2 A.Cs each of 1.5 kW is used for 5 h per day. Find:
- Total power consumed per day,
- Total power consumed in 30 days,
- Total electrical energy consumed in 30 days.
- The cost of electricity at the rate of ₹ 6.25 per unit.
Two lamps, one rated 220 V, 50 W and the other rated 220 V, 100 W, are connected in series with mains of 220 V. Explain why does the 50 W lamp consume more power.
An electrical appliance is rated as 60 W – 150 V.
How much current will flow through the appliance when in use?
Sumit does 600 J of work in 10 min and Amit does 300 J of work in 20 min. Calculate the ratio of the powers delivered by them.
