Q. 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. [table] Column-I | Column-II ; (A) Drift Velocity | (P) $\frac{m}{ne^2\rho}$ ; (B) Electrical Resistivity | (Q) $nev_d$ ; (C) Relaxation Period | (R) $\frac{eE}{m}\tau$ ; (D) Current Density | (S) $\frac{E}{J}$ [/table]
A) (A) - (R), (B) - (S), (C) - (Q), (D) - (P)
B) (A) - (R), (B) - (P), (C) - (S), (D) - (Q)
C) (A) - (R), (B) - (Q), (C) - (S), (D) - (P)
D) (A) - (R), (B) - (S), (C) - (P), (D) - (Q)
Explanation
[Solution] $v_d = eE\tau/m$; $\rho = E/J$; $\tau = m/(ne^2\rho)$; $J = nev_d$. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.