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COMMERCIAL UNIT OF ENERGY

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Kilowatt-hour
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LAKHMIR SINGH & MANJIT KAUR-WORK AND ENERGY-Exercise
  1. When a ball is thrown inside a moving bus, does its kinetic energy dep...

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  2. A bullet of mass 15 g has a speed of 400 m/s. What is its kinetic ener...

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  3. COMMERCIAL UNIT OF ENERGY

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  4. One kilowatt-hour is equal to :

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  5. Name two units of power bigger than watt.

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  6. Define the term 'watt'.

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  7. One horse power is equal to

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  8. Name the physical quantity whose unit is watt.

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  9. What is the power of a body which is doing work at the rate of one jou...

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  10. A body does 1200 joules of work in 2 minutes. Calculate its power.

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  11. How many joules are there in one kilowatt-hour?

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  12. Name the quantity whose unit is : (a) kilowatt (b) kilowatt-hour

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  13. What is the common name of '1 kWh' of electrical energy?

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  14. A cell converts one form of energy into another form. Name the two for...

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  15. Name the device which converts electrical energy into mechanical energ...

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  16. Name the devices or machines which convert : (a) Mechanical energy i...

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  17. Name the devices or machines which convert : (i) Electrical energy i...

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  18. Fill in the following blanks with suitable words : (a) Power is the ...

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  19. A trolley is pushed along a road with a force of 400 N through a dista...

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  20. What kind of energy transformations take place at a hydroelectric powe...

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