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A carbon and an aluminium wire are conne...

A carbon and an aluminium wire are connected in series. If the combination has resistance of `30Omega` at `30^@C`, what is the resistance of each wire at `0^@C`so that resistance of the combination does not change with temperature.`(a_c=-0.5 times 10^-3//^@C,a_A=4 times 10^-3//^@C`)

A

`120 Omega`

B

`15Omega`

C

`60 Omega`

D

`210 Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
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