Three materials A, B, C have electrical conductivities σ, 2σ,and 2σ

1.	Three materials A, B, C have electrical conductivities σ, 2σ,and 2σ respectively their number densities of free electron are n, 2n and n respectively. for which material is the average collision time of free electrons maximum.
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Three materials A, B, C have electrical conductivities σ, 2σ,and 2σ respectively their number densities of free electron are n, 2n and n respectively. for which material is the average collision time of free electrons maximum.

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here is your answer in the ATTACHMENT HOPE it HELP ✌️

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Three materials A, B, C have electrical conductivities σ, 2σ,and 2σ respectively their number densities of free electron are n, 2n and n respectively. for which material is the average collision time of free electrons maximum. ​

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Three materials A, B, C have electrical conductivities σ, 2σ,and 2σ respectively their number densities of free electron are n, 2n and n respectively. for which material is the average collision time of free electrons maximum.