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A wire of length 1 m and radius 0.1mm ha...

A wire of length 1 m and radius 0.1mm has a resistance of `100(Omega)`.Find the resistivity of the material .

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`l = 1m , r = 0.1 xx (10^-3) `
` R = 1000 Omega , f = ?`
` rArr R= rho(l/a) `
` rArr rho = Ra/l`
` =(100 xx 3.14 xx 0.1 xx 0.1 xx (10^-6)/1)`
` = 3.14 xx (10^-6)`
` = pi xx (10^-6) Q-m.`
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HC VERMA-ELECTRIC CURRENT IN CONDUCTORS-Exercises
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  3. A wire of length 1 m and radius 0.1mm has a resistance of 100(Omega).F...

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  6. What length of a copper wire of cross-sectional area 0.01 mm^2 will be...

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  7. Shown a conductor of length l having a circular cross section. The rad...

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  8. A copper wire of radius 0.1mm and resistance 1k(Omega)is connected acr...

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  9. Calculate the electric field in a copper wire of cross-sectional area2...

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  10. A wire has a length of 2.0m and a resistance of 5.0(Omega).Find the el...

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  11. The resistances of an iron wire and a copper wire at 20^(@)Care 3.9(Om...

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  12. The current in a conductor and the potential difference across its end...

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  13. Shown an arrangement to measure the emf (epsilon)and internal resistan...

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  14. The potential difference between the terminals of a battery of emf 6.0...

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  15. The potential difference between the terminals of a 6.0V battery is 7....

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  16. The internal resistance of an accumulator battery of emf 6V is 10(Omeg...

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  17. Find the value of i(1)/I(2)in figure if where R=10Omega

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  18. Consider N=n(1)n(2)indentical cells, each of emf(epsilon) and internal...

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  19. A battery of emf 100V and a resistor of resistance 10k(Omega)are joine...

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  20. If the reading of ammeter A(1)in figure is 2.4 A, what will the ammete...

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