Physics Question from JEE Main 2025 · 22 January, Shift 2

A proton is moving undeflected in a region of crossed electric and magnetic fields at a constant speed of $2 \times 10^5 \, \text{m/s}$. When the electric field is switched off, the proton moves along a circular path of radius $2 \, \text{cm}$. The magnitude of electric field is $x \times 10^4 \, \text{N/C}$. The value of $x$ is _____. (Take the mass of the proton as $1.6 \times 10^{-27} \, \text{kg}$).