explain with the help of graph the variation of conductivity with temperature for metallic conductor
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decrease with increase of temperature
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Explanation:
The electrical conductivity of a metallic conductor decreases with increase in temperature. A metallic conductor is made up of ionic cores(fixed at lattice points) and free electrons(moving within the conductor). With the increase in temperature the ionic cores start vibrating at their fixed points resulting in the scattering of free electrons. This increases the resistivity of material and hence the conductivity decreases.
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