An electron travelling in a uniform electric field passes from a region of potential V₁ to a region of higher potential V₂. Then

As the electron is going from low potential to high potential, its potential energy decreases, which results in increase in KE. Hence speed definitely increases. Direction of motion may or may not change depending on the angle at which it enters the other region. If $\mathrm{\theta }$ is zero, then direction of motion remains same.

$\mathrm{vsin\alpha }=\mathrm{usin\theta }\text{, but }\mathrm{vcos\alpha }>\mathrm{ucos\theta }$

so     $\mathrm{\alpha }<\mathrm{\theta },\mathrm{v}=\mathrm{u}$