1.

The resistance of 300 m long wire with cross-sectional area 10^(-6)m^2 and resistivity 10^(-7) Omegam is …………… .

Answer»

`30 Omega`
`3 Omega`
`0.3 Omega`
`300 Omega`

Solution :`R = RHO l/A`
`= 10^(-7) xx 300/(10^(-6))`
`=30 Omega`


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