Nichrome and copper wires of same length and same radius are connected in series. Current I is passed through them.
Nichrome and copper wires of same length and same radius are connected in series. Current I is passed through them. Which wire gets heated up more ? Justify your answer.
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Nichrome wire gets heated up more.
Heat dissipated in a wire is given by
\(H=I^2Rt\)
\(H=I^2 \,\frac{pl}{A}t\) \((\because\,R=\frac{pl}{A})\)
Here, radius is same, hence area (A) is same. Also, current (I) and length (l) are same.
\(\therefore \,H\infty\,r\)
But Pnichorme > Pcopper
∴ Hnichrome > Hcopper
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