Friday

November 28, 2014

November 28, 2014

Posted by **Emma** on Monday, November 19, 2012 at 2:33pm.

resistivity of the material is measured to be 11 x 10-8 ohms/m and the density is 7.86 g/cm3. The

material is to be shaped into a solid cylindrical wire that has a total resistance of 1.5 ohms.

a) What length of wire is required?

b) What must be the diameter of the wire?

- physics, university -
**Elena**, Monday, November 19, 2012 at 3:03pmm=0.05 kg, ρ =11•10⁻⁸ Ω/m

d=7860 kg/m³ R=1.5Ω

R= ρ•L/A

d=m/V=m/A•L

R/d= ρ•L²•A/A•m = ρ•L²/m.

L=sqrt{m•R/ρ•}=…

A= ρ•L/R = …

A=πD²/4

D=sqrt(4A/π)=…

**Answer this Question**

**Related Questions**

Physics II - A 51.0 g sample of a conducting material is all that is available. ...

physics - A 50.0-g sample of a conducting material is all that is available. The...

Physics - A sample of an unknown material appears to weigh 275 N in air and 160 ...

Physics Help Please - A sample of an unknown material appears to weigh 270 N in ...

physics - Which statements are true for the resistivity of a metal conductor: It...

physics - A sample of an unknown material appears to weigh 285 N in air and 165 ...

chem - the following procedure may be used to determine the density of a ...

Physics - A 100 m long wire with a cross-sectional area of 4 mm2 has a ...

Intro to Physics - A sample of an unknown material appears to weigh 295 N in air...

Science - A girl makes a sample of a new material and says that the density of ...