AIPMT | 2015Magnetic field due to currentHard
Question
An electron moving in a circular orbit of radius r makes n rotations per second. The magnetic field produced at the center has magnitude :
Options
A.Zero
B.
C.
D.
Solution
Magnetic field due to a circular loop
B =
Where N → no. of loops
I =
= ne
B =
(Here N = 1 as e- makes only one loop)
hence option (3)
B =
Where N → no. of loopsI =
= neB =
(Here N = 1 as e- makes only one loop)hence option (3)
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