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Four wires made of same material have di...

Four wires made of same material have different lengths and radii, the wire having more resistance in the following case is

A

`l=100cm, r=1mm`

B

`l=50cm, r=2mm`

C

`l=100cm, r=(1)/(2)mm`

D

`l=50cm, r=(1)/(2)mm`

Text Solution

Verified by Experts

The correct Answer is:
C
`Ralpha(l)/(r^(2))`. Chech the options
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