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Nichrome name copper wire of same length...

Nichrome name copper wire of same length and same radius ae connected in series circuit I is passed through them. Which wire gets heated up more ? Give reason.

Text Solution

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In series the current I is same through both wires Rate of production of heat `P=I^(2)RrArr P alpha R`
(or) `H=I_(2)=Rt rArr H alpha R.`
H-amount of heat produced , R-resistance of the wire.
Nichrome wire is heated up more since resistivity is more and hence resistance of nichrome wire is much more than that of copper wire of same lenght & radius.
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Knowledge Check

  • The ratio of resistances of two copper wires of the same length and of same cross sectional area when connected in series to that when connected in parallel is

    A
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    B
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    A
    circle
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