There is a uniform electric field of strength `10^(3) V m^(-1)` along y-axis. A body of mass 1 projected into the field from origin along the positive x-axis with a velocity 10 `ms^(-1),` Its speed in `ms^(-1) ` after 10 s is (Neglect gravitation)

Options

A. 10
B. `5 sqrt(2)`
C. `10 sqrt(2)`
D. 20

Answer

(a)

Explanation

The body is moving perpendicular to the direction of electric field
Therefore, the velocity of the body remains same .i.e., 10`ms^(-1) `