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Define conductivity of a material. State...

Define conductivity of a material. State its unit and dimension.

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CHETANA PUBLICATION-ELECTRIC CURRENT THROUGH CONDUCTORS-EXERCISE
  1. Define specific resistance (resistivity). State its unit and dimension...

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  2. Write the different formulae of resistivity.

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  3. Define conductivity of a material. State its unit and dimension.

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  4. Write different formulae of conductivity.

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  5. Calculate the resistance per metre, at room temperature, of a constant...

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  6. A 6m long wire has diameter 0.5 mm. Its resistance is 50 Omega. Find t...

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  7. What is the resistance of one of the rails of a railway track 20 km lo...

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  8. Explain the effect of temperature on resistance?

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  9. Explain the effect of temperature on resistivity.

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  10. Explain phenomenon of superconductivity.

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  11. State the applications of superconductivity.

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  12. A piece of platinum wire has resistance of 2.5 Omega 0^@C. If its temp...

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  13. A silver wire has a resistance of 4.2 Omega at 27^@C and resistance 5....

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  14. Define : Internal resistance

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  15. Define : Electromotive force

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  16. Define : Terminal potential differences.

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  17. State the advantages of cells in series.

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  18. State the advantages and disadvantages of cells in parallel

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  19. Derive the expression for Eeq and req when two cells are connected in ...

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  20. State different types of electrical cells.

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