Column-I gives certain physical quantities as | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) $1$. Mobility $(\mu)$ is defined as the drift velocity per unit electric field: $\mu = \frac{v_d}{E}$. Thus,$A \rightarrow R$.$2$. Electrical cond

Vedclass · Accepted Answer

$A \rightarrow R ; B \rightarrow S ; C \rightarrow P ; D \rightarrow Q$

Vedclass · Answer

(A) $1$. Mobility $(\mu)$ is defined as the drift velocity per unit electric field: $\mu = \frac{v_d}{E}$. Thus,$A ightarrow R$.$2$. Electrical conductivity $(\sigma)$ is the ratio of current density $(J)$ to the electric field $(E)$: $\sigma = \frac{J}{E}$. Thus,$B ightarrow S$.$3$. Relaxation time $(	au)$ is related to resistivity $(ho)$ by the formula $ho = \frac{m}{ne^2 	au}$,which implies $	au = \frac{m}{ne^2 ho}$. Thus,$C ightarrow P$.$4$. Current $(I)$ is given by the relation $I = neAv_d$,where $n$ is electron density,$e$ is charge,$A$ is area,and $v_d$ is drift velocity. Thus,$D ightarrow Q$.Therefore,the correct matching is $A ightarrow R, B ightarrow S, C ightarrow P, D ightarrow Q$.

$A$. Mobility	$P$. $\frac{m}{ne^2 \rho}$
$B$. Electrical conductivity	$Q$. $neAv_{d}$
$C$. Relaxation period	$R$. $\frac{v_{d}}{E}$
$D$. Current	$S$. $\frac{J}{E}$

Similar Questions

Two electric bulbs marked $40\,W, 220\,V$ and $60\,W, 220\,V$ are connected in series across a $220\,V$ supply,resulting in an effective power $P_1$. When they are connected in parallel across the same $220\,V$ supply,the effective power is $P_2$. The ratio $\frac{P_1}{P_2}$ is:

The cold junction of a thermocouple is maintained at $10\,^{\circ}C$. No thermo $e.m.f.$ is developed when the hot junction is maintained at $530\,^{\circ}C$. The neutral temperature is ................ $^{\circ}C$.

The figure shows a tetrahedron,each side of which has a resistance $r$. Choose the correct diagram$(s)$,which show a two-dimensional equivalent of the tetrahedron.

$A$ cell of emf $E$ has an internal resistance $r$ and is connected to a rheostat. When the resistance $R$ of the rheostat is changed,which is the correct graph of the potential difference $V$ across it?

Electroplating does not help in

Vedclass Test Series

Exam Paper Generator

Online Exam Module