A sheet of copper is 5 mm thick and has
surface dimensions of 7 cm × 22 cm .
If the long edges are joined to form a
tube 22 cm in length, what is the resistance between the ends? The mass density
of copper is 8920 kg/m3
and its resistivity is
1.7 × 10−8 Ω · m .
Answer in units of Ω

Explanation:

We have,

Dimension of the sheet is 7 cm × 22 cm.

Length of the tube, l = 22 cm

Resistivity of the copper wire is

It is required to find the resistance between the ends. We know that the formula of resistance is given by :

A is area of sheet

So, the resistance between the ends is .            

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the answer is to check all of them! they all apply well at least i think so!