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The resistance of 300 m long wire with c...

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

A

`30 Omega`

B

`3 Omega`

C

`0.3 Omega`

D

`300 Omega`

Text Solution

Verified by Experts

The correct Answer is:
A
`R = rho l/A`
`= 10^(-7) xx 300/(10^(-6))`
`=30 Omega`
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