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Define the term 'watt'....

Define the term 'watt'.

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LAKHMIR SINGH & MANJIT KAUR-WORK AND ENERGY-Exercise
  1. One kilowatt-hour is equal to :

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  2. Name two units of power bigger than watt.

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  3. Define the term 'watt'.

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  4. One horse power is equal to

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  5. Name the physical quantity whose unit is watt.

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

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

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

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

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

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

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

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

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

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

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

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

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  18. What kind of energy transformations take place at a coal-based thermal...

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  19. A man weighing 500 N carried a load of 100 N up a flight of stairs 4 m...

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  20. The power output of an engine is 3 kW. How much work does the engine d...

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