हिंदी

Define Kilowatt-hour.

Advertisements
Advertisements

प्रश्न

Define kilowatt-hour.

एक पंक्ति में उत्तर
Advertisements

उत्तर

One-kilowatt hour can be defined as the amount of electrical energy consumed when an electrical appliance of power rating 1 kilowatt is used for 1 hour.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 4: Work and energy - Very Short Answers 2 [पृष्ठ १६२]

APPEARS IN

लखमीर सिंग Physics Part 1 [English] Class 9
अध्याय 4 Work and energy
Very Short Answers 2 | Q 2 | पृष्ठ १६२

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

What is power?


A lamp consumes 1000 J of electrical energy in 10 s. What is its power?


What is the power of a body which is doing work at the rate of one joule per second?


A trolley is pushed along a road with a force of 400 N through a distance of 60 m in 1 minute. Calculate the power developed.


A man weighing 500 N carried a load of 100 N up a flight of stairs 4 m high in 5 seconds. What is the power?


A car of weight 20000 N climbs up a hill at a steady speed of 8 m/s, gaining a height of 120 m is 100 s. Calculate : work done by the car.


In an experiment to measure his power, a student records the time taken by him in running up a flight of steps on a staircase. Use the following data to calculate the power of the student :

Number of steps = 28
Height of each step = 20 cm
Time taken = 5.4 s
Mass of student = 55 kg
Acceleration = 9.8 m s−2
due to gravity


In loading a truck, a man lifts boxes of 100 N each through a height of 1.5 m. (g = 10 m s−2)

  1. How much work does he do in lifting one box?
  2. How much energy is transferred when one box is lifted?
  3. If the man lifts 4 boxes per minute, at what power is he working?

An electric motor raises a load of 0.2 kg, at a constant speed, through a vertical distance of 3.0 m in 2 s. If the acceleration of free fall is 10 m/s2, the power in W developed by the motor in raising the load is :


How is the power related to the speed at which a body can be lifted? How many kilograms will a man working at the power of 100 W, be able to lift at a constant speed of 1 m s–1 vertically? (g = 10 m s–2)


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×