A wire of resistivity "s" is stretched to double it's length. Find its

1.	A wire of resistivity "s" is stretched to double it's length. Find its new resistance and resistivity
Answer» if the length of the wire is INCREASED the resistance increases.The resistant increases there will be INCREASE in TEMPERATURE so there is a increase in resistivity. rho= s l= 2l rho=R × A/l R=rho × l/A AREA of cylinder=2πr² R=s×2l/2πr²

A wire of resistivity "s" is stretched to double it's length. Find its new resistance and resistivity

Answer»

if the length of the wire is INCREASED the resistance increases.The resistant increases there will be INCREASE in TEMPERATURE so there is a increase in resistivity.

rho= s

l= 2l

rho=R × A/l

R=rho × l/A

AREA of cylinder=2πr²

R=s×2l/2πr²

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A wire of resistivity "s" is stretched to double it's length. Find its new resistance and resistivity

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