Posted by **Melissa** on Wednesday, February 15, 2012 at 1:07am.

A wire of length L and cross-sectional area A has resistance R. What will be the resistance R_stretched of the wire if it is stretched to twice its original length? Assume that the density and resistivity of the material do not change when the wire is stretched.

Express your answer in terms of the wire's original resistance R.

- Physics!! Help!!!!! -
**drwls**, Wednesday, February 15, 2012 at 1:15am
The product L*A remains constant after stretching. If L doubles, A decreases by 1/2

Resistance is proportional to L/A.

R2/R1 = L2/L1 *A1/A2 = 4

R1 is the original resistance and R2 is the final resistance.

- Physics!! Help!!!!! -
**If the diamèter of the wire is doubled and its length is halved then its young's modulus**, Sunday, May 4, 2014 at 12:21am
A)becomes double B)remains same C)becomes half C)becomes square

- Physics!! Help!!!!! -
**If the diamèter of the wire is doubled and its length is halved then its young's modulus**, Sunday, May 4, 2014 at 12:24am
Remain same

- Physics!! Help!!!!! -
**MANIRAGUHA Eric**, Sunday, September 4, 2016 at 2:56am
Consider a c-Si solar cell whose fingers have a resistance R=0.1 Ohm. What would be the finger's resistance (in Ohm) if the finger's width is doubled and the finger's height is one third of its initial value?

## Answer This Question

## Related Questions

- College Physics - A wire P has resistance R. If the wire is stretched and its ...
- Physics - A wire of cross-sectional area 5.00x10^-6 m^2 has a resistance of 1.75...
- physics - Consider two copper wires with the same cross-sectional area. Wire A ...
- physics - a wire has a resistance of 6 ohm it is stretched out to a new length ...
- physics - A wire of length L m has 2 ohms resistance. It is stretched twice its...
- physics - A wire has a resistance of R. What will the wire's resistance be if ...
- Physics - A wire with a circular cross section and a resistance R is lengthened ...
- Physics - Two wires with the same resistance have the same diameter but ...
- Physics - The filament in an incandescent light bulb is made from tungsten (...
- Physics - (1) 45 micro coulombs of charge is passed through a wire in 35 seconds...

More Related Questions