Question
What is the meaning of the symbol $kWh?$ What quantity does it represent$?$
✓
Answer
The unit $kWh$ stands for kilowatt-hour. One kilowatt-hour is the amount of electrical energy consumed when an electrical appliance having power of $1$ kilowatt is used for $1$ hour. It represents the amount of electrical energy consumed in $1$ hour.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A body travels a distance of 3km towards East, then 4km towards North and finally 9km towards East.
- What is the total distance travelled?
- What is the resultant displacement?
How are minerals replenished in the soil of a crop field?
A test tube loaded with lead shots weighs 50 gf and floats upto the mark 'X' in water. The test tube is then made to float alcohol. It is found that 10 gf of lead shots have to be removed, so as to float it to level 'X'. Find RD of alcohol.
What is soil erosion? Explain means of preventing it.
Give four important functions of epithelial tissue. Name one specific place in the body where each function is carried out.
Describe some flight adapiations of the birds.
A cyclist is travelling at $15ms^{-1}. $She applies brakes so that she does not collide with a wall $18\ m$ away. What deceleration must she have?
→$i.$ Which characteristic of sound helps to identify your friend by his voice while sitting with others in a dark room?
$ii.$ State the relationship between frequency and time period of a wave. The wavelength of vibrations produced on the surface of the water is $4 \ cm.$ If the wave velocity is $20\ m/s$ find the frequency and Time period.
→$ii.$ State the relationship between frequency and time period of a wave. The wavelength of vibrations produced on the surface of the water is $4 \ cm.$ If the wave velocity is $20\ m/s$ find the frequency and Time period.
Write short notes on:
Tuberculosis.
Tuberculosis.
The speed-time graph for a car is shown is Fig
a. Find how far does the car travel in the first 4 seconds? Shade the area on the graph that represents the distance travelled by the car during the period.
b. Which part of the graph represents uniform motion of the car?
a. Find how far does the car travel in the first 4 seconds? Shade the area on the graph that represents the distance travelled by the car during the period.
b. Which part of the graph represents uniform motion of the car?