wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A uniform magnetic field acts right angles to the direction of motion of electrons.As a result, the electron moves in a circular path of radius 2 cm, if the speed of electrons is doubled, then the radius of the circular path will be.

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

The correct option is D 4.0 cm
The radius of the electron moving in a magnetic field is given by:
r=mvqB

rv,

So, when the speed of the electron is doubled, the radius will also be doubled for the electron.
r2=2r1=2×2=4 cm

flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Charge Motion in a Magnetic Field
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon