What is the resistance of a 20.0 meter long tungsten rod with a cross sectional area of 1.00 times 10^-4 meter^2 at 20C

Explanation:

The resistance of an object tells us how much the object opposes to the flow of current through it.

The resistance of a conductor is given by the formula

where

is the resistivity of the material

L is the length of the conductor

A is the cross-sectional area

For the tungsten rod in this problem, we have:

L = 20.0 m is the length

is the cross-sectional area

is the resistivity of tungsten at 20C

Substituting into the formula, we find the resistance of the tungsten rod:

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