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Name the energy transfers which occur wh...

Name the energy transfers which occur when :
(a) an electric bell rings
(b) someone speaks into a microphone
(c) there is a picture on a television screen
(d) a torch is on

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Verified by Experts

The correct Answer is:
(a) Electrical energy to Sound energy (b) Sound energy to Electrical energy (c) Electrical energy to Light energy (and Heat energy) (d) Chemical energy to Electrical energy to Light energy (and Heat energy)
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LAKHMIR SINGH & MANJIT KAUR-WORK AND ENERGY-Exercise
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  2. In loading a truck, a man lifts boxes of 100 N each through a height o...

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  3. Name the energy transfers which occur when : (a) an electric bell ri...

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  4. A force of 7 N acts on an object. The displacement is, say 8 m, in the...

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  5. When do we say that work is done ?

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  6. Write an expression for the work done when a force is acting on an obj...

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  7. Define 1 J of work.

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  8. A pair of bullocks exerts a force of 140 N on a plough. The field bei...

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  9. What is the kinetic energy of an object ?

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  10. Write an expression for kinetic energy of an object.

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  11. The kinetic energy of an object of mass m moving with a velocity of 5 ...

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  12. What is power ?

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  13. Define 1 W of power.

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

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  15. Define avarage power.

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  16. Look at the activites listed below. Reason out whether or not work is ...

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  17. An object thrown at a certain angle to the ground moves in a curved pa...

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  18. A battery lights a bulb. Describe the energy changes involved in the p...

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  19. Certain force acting on a 20 kg mass changes its velocity from 5m//s t...

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  20. A mass of 10 kg is at a point A on a table. It is moved to a point B. ...

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