The number density of free electrons in copper is nearly . A copper wire has its area of cross section and is carrying a current of 3.2 A. The drift speed of the electrons is _______ . [2023]

STUDY MATERIALS
COURSES
MORE
SUCCESS STORY
ADMISSION
STORE

Back

JEE ADVANCE

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

JEE MAIN

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

NEET

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

BITSAT

CLASS XI - XII

CLASS XI - XII

CBSE BOARD

CLASS IX

CLASS X

CLASS XI

CLASS XII

CLASS VI

CLASS VII

CLASS VIII

UP BOARD

CLASS IX
CLASS X
CLASS XI
CLASS XII

CLASS IX

CLASS X

CLASS XI

CLASS XII

CUET

CRASH COURSE

CRASH COURSE

Courses

CLASSROOM COURSES
ONLINE COURSES

ONLINE COURSES

More

Solution

Q.
The number density of free electrons in copper is nearly $8 \times 10^{28} m^{- 3}$ . A copper wire has its area of cross section $= 2 \times 10^{- 6} m^{2}$ and is carrying a current of 3.2 A. The drift speed of the electrons is _______ $\times 10^{- 6} {ms}^{- 1}$ . [2023]

Ans.
(125)

$n = 8 \times 10^{28} m^{- 3}, Area = 2 \times 10^{- 6} m^{2}, I = 3.2 A$

$I = n e A v_{d}$

$v_{d} = \frac{I}{n e A} = 125 \times 10^{- 6} m/s$

Want Us to Email you About Special Offers & Updates?