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Define velocity and derive the expressio...

Define velocity and derive the expression for it in a conductor in terms of relaxation time.

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Drift velocity is defined as the velocity of free electrons with which they get drifted towards the positive terminal under the influence of the external field. Drift velocity in terms of relaxation time `(tau)`
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MODERN PUBLICATION-CURRENT ELECTRICITY-REVISION EXERCISES (SHORT ANSWER QUESTIONS)
  1. Show that drift velocity is in a direction opposite to the drirection ...

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  2. Define relaxation time of the free electrons drifiting in a conductor....

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  3. Define velocity and derive the expression for it in a conductor in ter...

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  4. Electron drift speed is estimated to be of the order of mm s^(-1). Yet...

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  5. A series combination of three resistors takes current 2 A from a 24 V ...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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