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Why heat energy is produced, when electr...

Why heat energy is produced, when electric current passes through a resistance wire?

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BINA LIBRARY-CURRENT ELECTRICITY-EXERCISE
  1. Give an example of circular motion.

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  2. What is meant by rectilinear motion? Give two examples.

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  3. Why heat energy is produced, when electric current passes through a re...

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  4. Obtain an expression for the heat produced in a wire, when a current I...

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  5. Write two differences between electromotive force and potential differ...

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  6. Give two example of periodic motion.

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  7. What is the principle of a meter bridge.

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  8. State the principle of working of a potentiometer.

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  9. If the length of a wire is doubled and cross-sectional area is halved,...

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  10. Two ends of a conducting wire of non-uniform cross-section are connect...

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  11. The magnitude of drift velocity of free electrons in a conductor is ve...

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  12. Why are the car lights dimmed when the starter is operated?

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  13. Why is it easier to start a car engine on a warm day than on a chilly ...

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  14. What is rolling friction ?

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  15. When is Wheatstone bridge most sensitive ?

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  16. Why do we prefer a potentiometer with longer wire?

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  17. Why do we prefer a potentiometer with longer wire?

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  18. Why should the balance point be obtained in the middle of the wire of ...

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  19. Define friction.

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  20. A potential difference of 5 V is applied across a conductor of length ...

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