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

Biot-Savart law indicates that the moving electrons (velocityv) produce a magnetic field B such that:


A

Bv

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B

Bv

No worries! We‘ve got your back. Try BYJU‘S free classes today!
C

It obeys the inverse cube law

No worries! We‘ve got your back. Try BYJU‘S free classes today!
D

It is along the line joining the electron and the point of observation

No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A

Bv


The explanation for the correct answer:

Option(A): Bv

According to Biot-Savart law, the magnitude B is given as:

B=μ04π|q|vsinϕr2
The magnetic field as a vector is given as:

B=μ04π|q|(v×r)r3η^

Clearly, B is perpendicular to v.

The explanation for the incorrect answer:

Option(B): Bv

The magnetic field produced by charges moving with velocity v¯, at a distance ris Bμ04π·qv¯×r^r2

Option(C): It obeys the inverse cube law

The direction of Bis along (v×r), i.e., perpendicular to the plane containing v and r.B at a point obeys inverse square law and not inverse cube law.

Option(D): It is along the line joining the electron and the point of observation

According to Biot-Savart law, we get B is perpendicular to v

Therefore, option A is the correct choice.


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Dimensional Analysis
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon