Science, asked by aindlanarsingrao, 11 months ago

if the length and area of cross section of a copper wire is changed guess

Answers

Answered by rowdylone

Explanation:

Resistance= Resistivity x length/area

When the wire is stretched to double the length , the area of cross section gets reduced to half.

New Resistance = Resistivity x 2length/area/2

I.e,

New resistance = (Resistivity x length/area)x4

i.e, New resistance = Resistance x 4

So when the wire is stretched, the resistance multiplies by four times.

Hope you understood. Keep exploring

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