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 unit in which we pay the cost of electricity is ..........
The electrical energy consumed in a house is measured by ...............
One kilowatt hour is equal to ............ joule.
If an appliance of power P watt is used for time t hour. How much electrical energy is consumed in kWh?
What is an electric fuse? State its purpose in the household electrical circuit.
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.


Draw a labelled diagram with the necessary switches to connect a bulb, a fan and a plug socket in a room with the mains. In what arrangement will you connect them to the mains?
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.
Our body can pass electricity through it.
