Question

If an electron has an initial velocity in a direction different from that of electric field the path of the electron is

• A. Straight line
• B. Circle
• C. Ellipse
• D. parabola

Answer 1

The correct option is D parabola

Given: electron has initial velocity different from electric field

Solution: If electron has initial velocity different from electric field

then let the electron is moving in angle $\theta$

Along x-axis ,$v_x=vcos\theta$

Along y-axis ,$v_y=vsin\theta$

There will be only change in x- direction as electric field is in x- direction

We know that a is perpendicular to v the the particle will follow parabolic path

Hence the correct option is D