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A 5^(@)C rise in temperature is observed...

A `5^(@)C` rise in temperature is observed in a conductor by passing a current. When the current is doubled the rise in temperature will be approximately

A

`15^(@)C`

B

`20^(@)C`

C

`25^(@)C`

D

`30^(@)C`

Text Solution

Verified by Experts

The correct Answer is:
B
`I^(2)RT =msDeltatheta`
`implies" "I^(2) prop Deltatheta`
`(Deltatheta_(2))/(Deltatheta_(1))=I_(2)^(2)/I_(1)^(2)`
`implies" "(Deltatheta_(2))/5=(2)^(2)" "implies Deltatheta_(2)=20^(@)C`
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