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What is the current electricity?...

What is the current electricity?

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CHETANA PUBLICATION-ELECTRIC CURRENT THROUGH CONDUCTORS-EXERCISE
  1. What is the current electricity?

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  2. What happens when a potential difference is applied across the ends ...

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  3. Define electric current. State its S.I. unit and dimension

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  4. Give the sign convention of electric current.

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  5. A current 4A flows through an automobile headlight. How many electrons...

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  6. Explain the concept of drift speed occupied by the electrons in a cond...

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  7. Define current density. State its formula and units.

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  8. Prove that the current density of a metallic conductor is directly pro...

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

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

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

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  12. State Ohm's law.

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

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  14. Define S.I. unit of resistance.

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  15. Draw VI. curve of a conductor.

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  16. Define conductance. State its unit and dimension

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

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

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

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

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