find new resistance of wire if it is stretched to twice its original length. original resistance is 20 ohm. also how its resistivity will change?
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Answer:
80 ohm
Explanation:
is in the pic.
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ishagupta466:
I can't understand the initially one
see
Lemme add one more pic to it
ρ=Resistivity of the wire
l=lenght of wire
A= cross section of the wire
l=lenght of wire
A= cross section of the wire
The app not letting me crop it properly
okay thanks now I understand
:)
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