wiz-icon
MyQuestionIcon
MyQuestionIcon
50
You visited us 50 times! Enjoying our articles? Unlock Full Access!
Question

Find the drift velocity in Cu wire if it has 1A current through 2 mm cross-section. Free electron density is 8.5×1022 cm3

A
0.36 mms1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
0.36 cms1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
0.036 mms1
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
0.036 cms1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C 0.036 mms1
Given
I=1A
A=2 mm2=2×106 m2
μe=8.5×1022 cm3=8.5×1028 m3
The current flowing through the Cu wire is
I=μe.e.A.vd
where, e is the charge on electron and vd is the drift velocity of electrons.
vd=Iμe.e.A
vd=1(8.5×1028)(1.6×1019)(2×106)
vd=127.2×103

vd=0.03676×103 ms1

vd0.036 mms1

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Electric Potential Due to Uniformly Charged Spherical Shell or Solid Sphere
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon