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A conductor of length l is connected to a d.c. source of potential V. If the length of the conductor is tripled by streaching it, keeping V constant, explain how do the following factors vary in the conductor. 1) drift velocity 2) resistance

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MODERN PUBLICATION-ELECTRIC CURRENT. RESISTANCE AND E.M.F-EXERCISE
  1. What do you understand by electrical resistivity and give its relation...

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  2. Show that the resistance of a conductor is given by: R = (ml)/(n e^2 t...

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  3. A conductor of length l is connected to a d.c. source of potential V. ...

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  4. Define 'relaxation time' in a conductor. Explain how it varies with in...

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  5. Define resistivity of a conductor. Explain the variation of resistance...

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  6. Define resistivity and state its SI unit. State and explain how to res...

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  7. Write the mathematical relation for the resistivity of a material in t...

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  8. Explain with the help of a graph, the variation of conductivity with t...

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  9. Explain the variation of conductivity of a metallic conductor with tem...

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  10. Express electrical conductivity in terms of charge, mass, number densi...

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  11. Define electric power and electric energy. Give their units.

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  12. Prove that electric energy (W) consumed in a conductor is given by the...

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  13. Obtain the formula for the power loss in a conductor of resistance R a...

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  14. Explain colour code for carbon resistors giving examples.

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  15. What is the need of combining different resistors? What is the resulta...

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  16. Derive expression for the total resistance of a circuit in which a few...

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  17. What do you mean by internal resiatnce, e.m.f. (electromotive force) a...

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  18. What is internal resistance of a cell? Derive an expression for it.

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  19. What do you mean by internal resiatnce, e.m.f. (electromotive force) a...

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  20. What is internal resistance of a cell? Derive an expression for it.

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