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Draw a graph representing the change in ...

Draw a graph representing the change in specific resistance with temperature.

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Drift velocity, `V_(d) = (e V tau)/(m l) = (e E tau)/(m)`
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which of the following graph represents the variation of resistivity ( rho ) with temperature (T) for copper?

Define the terms resistivity and conductivity and state their S. I. units. Draw a graph showing the variation of resistivity with temperature for a typical semiconductor.

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MODERN PUBLICATION-CURRENT ELECTRICITY-REVISION EXERCISES (VERY SHORT ANSWER QUESTIONS)
  1. A steady current flows in a metallic conductor of non-uniform cross se...

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  2. Are the paths of electrons straight lines between successive collision...

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  3. Draw a graph representing the change in specific resistance with tempe...

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  4. If the length of a wire conductor is doubled by stretching it, keeping...

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  5. If potential difference V applied across a conductor increased to 3V, ...

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  6. When a potential difference is applied across the ends of a conductor,...

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  7. How is the drift velocity in a conductor affected with the rise in tem...

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  8. Define the term 'mobility' of charge carriers. Write its S.I. unit.

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  9. How will you represent a resistance of 3700 Omega +- 5% using colour c...

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  10. How does the mobility of electrons in a conductor change, if the poten...

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  11. A wire of resistivity is stretched to double its length. What will be...

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  12. Two wires of equal length one of copper and other of manganin have the...

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  13. Show that equivalent resistance in parallel combination is always less...

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  14. Draw a graph to show the variation of resistance of a metal wire as a ...

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  15. Define the term electrical conductivity of a metallic wire. Write its ...

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  16. EMF of an electrical cell is 2 volt. A 10 Omega resistance is joined a...

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  17. How does the conductivity of a metallic conductor vary with temperatur...

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  18. Discuss the effect of temperature on the resistance of (i) metals (ii)...

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  19. For metal conductors, the electrical resistivity decreases with the ri...

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  20. Out of copper and nichrome, which has the larger value of temperature ...

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