CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A current of 2A passes through a wire for 20 minutes. The number of electrons that crossed the cross-section in this period is:

A
1.5×1021
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
1.5×1020
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
1.5×1022
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
1.5×1023
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C 1.5×1022
A current of 2A passes through a wire for 20 minutes. The number of electrons that crossed the cross-section in this period is
Given
Current through the wire is I=2A
Time for which current flows through the wire is t=20min=20×60s
Let n and e be the number and charge of electrons
that crossed the cross-section of wire in time t.
Now, the total charge, q(say) in the wire is
q=ne
Hence, the current flowing in time t is
I=qt
I=net
n=Ite
n=(2)(20×60)1.6×1019
n=24001.6×1019
n=1500×1019
n=1.5×1022

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Electrolysis and Electrolytes_Tackle
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon