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The magnitude of current density in a co...

The magnitude of current density in a copper wire is `500 A//cm^2`. If the number of free electrons per `cm^3` of copper is `8.47 xx 10^22`, calculate the drift velocity of the electrons through the copper wire (charge on an e =`1.6 xx 10^-19` C).

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CHETANA PUBLICATION-ELECTRIC CURRENT THROUGH CONDUCTORS-EXERCISE
  1. Prove that the current density of a metallic conductor is directly pro...

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  2. A metallic wire of diameter 0.02m contains 1028 free electrons per cub...

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  3. The magnitude of current density in a copper wire is 500 A//cm^2. If t...

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  4. A copper wire of radius 0.6 mm carries a current of 1A. Assuming the c...

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  5. State Ohm's law.

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  6. Explain the resistance of a conductor. State its unit and dimension.

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  7. Define S.I. unit of resistance.

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  8. Draw VI. curve of a conductor.

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  9. Define conductance. State its unit and dimension

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  10. Derive the relation between electric field and current density.

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  11. Show that σ = \(\frac{ne^2\tau}{m}\). Where symbols have usual meaning...

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  12. A Flashlight usestwo 1.5V batteries to provide a steady current of 0.5...

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  13. DC current flows in a metal piece of non-uniform cross-section. Which ...

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  14. Explain the limitations of Ohm's law.

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  15. Distinguish between ohmic substances and non-ohmic substances.

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  16. Define the expression for power. State its unit.

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  17. Explain the heating effect of electric current.

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  18. An electric heater takes 6A current from a 230V supply line, calculate...

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  19. The heating element connected to 230V draws a current of 5A. Determine...

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  20. What are resistors? State its types and uses.

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