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Write a relation between current and dri...

Write a relation between current and drift velocity of electrons in a conductor. Use this relaxation to explain how the resistance of a conductor change with the rise in temperature.

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MODERN PUBLICATION-CURRENT ELECTRICITY-REVISION EXERCISES (SHORT ANSWER QUESTIONS)
  1. A series combination of three resistors takes current 2 A from a 24 V ...

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  2. Derive an expression for the resistivity of a good conductor, in te...

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  3. Write a relation between current and drift velocity of electrons in a ...

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  4. State Ohm' law and deduce it from the knowledge of drift velocity of f...

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  5. How will you campare emf of two cells by potentiometer?

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  6. A set of 'n' identical resistors, each of resistance 'R' when connecte...

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  7. A wire of resistance R, length l and uniform area of cross-section A i...

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  8. A given wire having resistance R is stretched so as to reduce its diam...

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

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  10. Explain with the help of a graph the variation of conductivity with te...

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  11. Write two differences between ohmic circuit and non-ohmic circuit.

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  12. Draw a graph showing the variation of resistivity with temperature for...

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  13. Define the term resistivity of conductor. Give its SI units. Show that...

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  14. If n resistors each of resistance r are connected to get (i) maximum p...

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  15. (a) How will you represent a resistance of 3,700 + 10% ohm by a colour...

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  16. (a) A wire of resistance R, length l and area of cross-section A is cu...

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  17. State Joule's law of heating by electric current. Name the materials u...

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  18. The circuit shown in the diagram contains a battery "B" a rheostat "Rh...

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  19. Define internal resistance of a cell. Prove that r ~= ((E)/(V) - 1)R, ...

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  20. What is emf of a cell? On what factors does its value depend?

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