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Choose correct alternative. An electri...

Choose correct alternative.
An electric cable contains a single copper wire of radius 9 mm. Its resistance is `5 Omega`. This cable is replaced by six insulated copper wires, each of radius 3 mm. The resultant resistance of cable will be
A. `7.5 Omega`
B. `45 Omega`
C. `90 Omega`
D. `270 Omega`

A

`7.5 Omega`

B

`45 Omega`

C

`90 Omega`

D

`270 Omega`

Text Solution

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