Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Problem
Problem
The magnetic field at a distance
x
x
x
on the axis of a circular coil of radius
R
R
R
is
1
8
\frac{1}{8}
8
1
th of that at the centre. The value of
x
x
x
is (a)
R
3
\frac{R}{\sqrt{3}}
3
R
(b)
2
R
3
\frac{2R}{\sqrt{3}}
3
2
R
(c)
R
3
R\sqrt{3}
R
3
(d)
R
2
R\sqrt{2}
R
2
Browse the problem library