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## Homework Statement

the tungsten filament of a light bulb has a resistance of .07 ohm. if the filament is 27 cm long, what is the diameter

## Homework Equations

R= p(L/A)

Area of a circular cross section = (PiD^2/4)

## The Attempt at a Solution

R= p(L/A) A= (pL)/r

## Homework Statement

resistance .07 ohm. lengh= .27m, resistivity= 5.6x10^-8

diameter ?

## Homework Equations

A= (pL)/r