A proton is moving undeflected in a region of crossed electric and magnetic fields at a constant speed of 2 ×

A proton is moving undeflected in a region of crossed electric and magnetic fields at a constant speed of 2 × 10^5 ms^–1 . When the electric field is switched off, the proton moves along a circular path of radius 2 cm. The magnitude of electric field is x × 10^4 N/C. the value of x is _____. 

Take the mass of the proton = 1.6 × 10^–27 kg.          (JEE-2025)