An electron is accelerated through a `PD` of `100 V` and then enters a region where it is moving perpendiculasr to a magnetic fiedl `B=0.2T`. Find the radius of the circular path. Repeat this problem for a proton.

Explanation

To solve the problem of finding the radius of the circular path for both an electron and a proton when they are accelerated through a potential difference of 100 V and then enter a magnetic field of 0.2 T, we can follow these steps:

### Step 1: Calculate the Kinetic Energy of the Electron
When an electron is accelerated through a potential difference (PD) of 100 V, its kinetic energy (KE) can be calculated using the formula:
\[ KE = e \cdot V \]
where:
...