JEE Main 29 June 2022 Shift 2 Solved Paper

A potential barrier of 0.4V exists across a p-n junction. An electron enters the junction from the n-side with a speed of 6.0×105ms−1. The speed with which electron enters the p side will be ‌

x

3

×105ms−1 the value of x is____
(Given mass of electron =9×10−31‌kg, charge on electron =1.6×10−19C.)