PhysicsNEET 2021Ohm's law, resistivity, temperature dependence

Current Electricity

Column-I gives certain physical terms associated with the 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) $\frac{m}{n e ^{2} ρ}$
(B) Electrical resistivity	(Q) $n e v_{d}$
(C) Relaxation period	(R) $\frac{e E}{m} τ$
(D) Current density	(S) $\frac{E}{J}$

A.(A)-(R), (B)-(S), (C)-(P), (D)-(Q)✓
B.(A)-(R), (B)-(S), (C)-(Q), (D)-(P)
C.(A)-(R), (B)-(P), (C)-(S), (D)-(Q)
D.(A)-(R), (B)-(Q), (C)-(S), (D)-(P)

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