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Column - I : gives certain physical terms associated with flow of current through a metallic conductor.
Column-II : gives some mathematical relations involving electrical quantities. Match Column-I and Column-II with appropriate relations.
Column - I Column - II
(A) Drift Velocity (P) $\frac{m}{{ne}^{2} p}$
(B) Electrical Resistivity (Q) nev_d
(C) Relaxation Period (R) $\frac{eE}{m} τ$
(D) Current Density (S) E/J
A B C D
1. R Q S P
2. R S P Q
3. R S Q P
4. R P S Q

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answer is A.

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Detailed Solution

$\begin{array}{l} j = {neV}_{d} = σE \\ σ = j / E \Rightarrow ρ = E / j \end{array}$
(A) → (R)
(B) → (S)
(C) → (P)
(D) → (Q)

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