Question

please answer this with explanation.
no spams
no waste answers
answer only with explanation
please answer​

Answer 1

Answer:

i) Between copper and germanium

ii) See explanation

iii) Copper

iv) Air and glass at 20 C

Explanation:

i) Assuming that resistivity values are given at 20 C, the resistivity of aluminium is 2.65e-8, so in the order of least resistivity to greatest resistivity, it makes sense to place it between copper and germanium.

ii) Germanium is a pure element that, when doped, can conduct electricity. Glass is made of silica and is an amorphous solid. It lacks the structural and orderly pattern that crystalline solids have and impedes electron flow, so it has higher resistivity.

iii) Copper has the highest conductivity of the materials listed because its resistivity is the lowest.

iv) Air at has too much resistivity for the electric current to be significant. It should be noted, however, that air can still conduct electricity, when the difference in electric potential is great enough. You can see this during a thunderstorm when the difference in electric potential causes lightning.

Glass, at 20 C is also an insulator, but it should be noted that it technically is a semiconductor, since it conducts electricity fairly well at higher temperatures. The reason for this has to do with its structure on the atomical level.