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NEET PHYSICSMedium

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: (A) Drift Velocity, (B) Electrical Resistivity, (C) Relaxation Period, (D) Current Density. Column-II: (P) mne2ρ\frac{m}{ne^2\rho}, (Q) nevdnev_d, (R) eEmτ\frac{eE}{m}\tau, (S) EJ\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)

Step-by-Step Solution

Drift velocity vd=eEτmv_d = \frac{eE\tau}{m}. Electrical resistivity ρ=1σ=EJ\rho = \frac{1}{\sigma} = \frac{E}{J}. Relaxation period τ=mne2ρ\tau = \frac{m}{ne^2\rho}. Current density J=IA=nevdJ = \frac{I}{A} = nev_d. Thus, (A)-(R), (B)-(S), (C)-(P), (D)-(Q).

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