Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Problem
Problem
An electron moving in a circular orbit of radius
R
R
R
with frequency
f
f
f
. The magnetic field at the centre of the orbit is a.
μ
0
e
f
2
π
R
\frac{\mu_0 ef}{2\pi R}
2
π
R
μ
0
e
f
b.
μ
0
e
f
2
R
\frac{\mu_0 ef}{2R}
2
R
μ
0
e
f
c.
μ
0
e
f
2
2
R
\frac{\mu_0 ef^2}{2R}
2
R
μ
0
e
f
2
d. zero
Browse the problem library