An electron and proton enter a uniform magnetic field perpendicularly. Both have same kinetic energy. Which of the following is true?

Options

A. Trajectory of electron is less curved
B. Trajectory of proton is less curved
C. Both trajectories are equally curved
D. Both move on straight line path

Explanation

To solve the problem, we need to analyze the motion of an electron and a proton entering a uniform magnetic field perpendicularly, given that they have the same kinetic energy.

### Step-by-Step Solution:

1. **Understanding the Motion in a Magnetic Field**:
When a charged particle enters a magnetic field perpendicularly, it experiences a magnetic force that acts as a centripetal force, causing the particle to move in a circular path.

2. **Equating Magnetic Force and Centripetal Force**:
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