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Define resistivity of a conductor. Expla...

Define resistivity of a conductor. Explain the variation of resistance with temperature in semiconductors.

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MODERN PUBLICATION-ELECTRIC CURRENT. RESISTANCE AND E.M.F-EXERCISE
  1. A conductor of length l is connected to a d.c. source of potential V. ...

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

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

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

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

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

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

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

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

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

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

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  12. Explain colour code for carbon resistors giving examples.

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

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

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

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

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

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  20. What is the difference between e.m.f. and potential diffrence?

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