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Derive an expression for electric energy...

Derive an expression for electric energy in terms of potential difference, current and the time for which current flows through a conductor.

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PRADEEP-ELECTRICITY-(Additional)Short Answer
  1. A given wire is stretched to double its length. How will its resistanc...

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  2. A wire of 3 Omega resistance and 10 cm length is stretched to 30 cm le...

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  3. (a) When is the pd for all the resistors in a circuit the same and is ...

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  4. (a) How does the current divide itself in a parallel combination of re...

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  5. (a) How is heat produced in a conductor by an electric current ? (b)...

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  6. (a) Are electrons consumed in a electric circuit when a current flows ...

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  7. (a) How does an incandescent bulb work ? (b) Why is the resistance o...

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  8. (a) Why does resistance increase in a series combination of resistors ...

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  9. (a) If a number of bulbs of different wattages are joined in parallel,...

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  10. What do you mean by electric potential difference ? How is it measured...

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  11. State Ohm's law ? How can it be verified experimentally ? Does it hold...

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  12. What do you mean by electrical resistance ? How does it arise ? Give i...

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  13. What is electrical resistivity ? How does it depend om temperature. Gi...

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  14. Classify materials on the basis of their resistivities.

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  15. Find an expression for the equivalent resistance of three resistors jo...

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  16. Find an expression for equivalent resistance of three resistors joined...

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  17. Derive an expression for electric energy in terms of potential differe...

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  18. What is electric power ? Derive an expression for the same. Give its S...

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  19. What do you understand by the rating of an electric appliance ?

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  20. Discuss briefly three applications of heating effect of current.

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