RayeK6770 RayeK6770

25-02-2020
Physics

contestada

How long is a tungsten wire if it has a diameter of 0.103 × 10 − 3 m and a resistance of 2150 Ω ? The resistivity of tungsten is 5.62 × 10 − 8 Ω ⋅ m .

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pstnonsonjoku pstnonsonjoku

25-02-2020

Answer:317.5m

Explanation:

The detailed solution is shown in the image attached. The crossectional area of the wire is first obtained from the diameter of the wire which was given in the question. We apply the fact that half the diameter is equal to the radius. We then apply the formular shown in the solution to obtain the length of the wire.

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