Q. Following figure shows the path of an electron that passes through two regions containing uniform magnetic fields of magnitudes $B_{1}$ and $B_{2}$. It’s path in each region is a half circle, choose the correct option
A) $B_{1}$ is into the page and it is stronger than $B_{2}$
B) $B_{1}$ is into the page and it is weaker than $B_{2}$
C) $B_{1}$ is out of the page and it is weaker than $B_{2}$
D) $B_{1}$ is out of the page and it is stronger than $B_{2}$
Explanation
(a) Direction of field can be found using Fleming’s left hand rule and $r \propto \frac{1}{B}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.