The resistivity of a material is 4xx10^(...

The resistivity of a material is `4xx10^(-8)Omega` m and its conductivity . . . . . . . .

`25xx10^(-8)"mho m"^(-1)`

`0.25xx10^(-8)"mho m"^(-1)`

`25xx10^(8)"mho m"^(-1)`

`0.25xx10^(8)"mho m"^(-1)`

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The rod given in the figure is made up of two different materials. Both have square cross sections of 3 mm side. The resistivity of the first material is 4xx 10^(-3) Omega m and it is 25 cm long while second material has resistivity of 5 xx 10^(-3) Omega m and is of 70 cm long. Whati is the resistance of rod between its ends ?

The rod given in the figure is made up of two different materials. Both have square cross sections of 3 mm side. The resistivity of the first material is 4xx10^(-3)Omega.m and it is 25 cm long while second material has resistivity of 5xx10^(-3)Omega.m and is of 70 cm long. What is the resistivity of rod between its ends?

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