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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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  14. The potential dofference between the terminals of a battery of emf6.0V...

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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 (a)R=0.1(Omega) (b)R=1(Ome...

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

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