CTET 2 Math and Science Jan 2012 Paper

Question : 79 of 120

Marks: +1, -0

When electric current is passed through a metallic conductor, amount of heat produced in the conductor depends on its

Solution:

Heat produced in metallic conductor =

H=I^2Rt

{H}∝{R}

(Resistance of wire)

{R}=ρ\;\;{l}/{{A}}

⇒{R}∝\;\;{l}/{{A}}∝\;\;{{\length}}/{{CS}⋅{A}}

{C}.{S}⋅{A}∝

thickness.
ρ = specific resistance of material.

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