Question

An electron is moving horizontally to the right at a speed or 4 x 10^6ms^-1. It enters a region of length 20cm in which there
is an electic field of 1 x 10^3NC^-1 pointing downward as shown in diagram below

1. How long does it spend travelling from A to B
2. By how much and in what direction is the electron deflected, when it leaves the electric field? Describe the motionof the particle in the electric field and draw a rough sketch on the path
3. What is the magnitude of the vertical component of the velocity of the electron, when it leaves the electric field

Answer 1

4. What is the speed of the electron when it leaves the electric field.
5 Through what angle has the electron been deflected when it leaves the electric field
6. Describe and draw the rough sketch of its subsequent motion

Answer 2

Acceleration in constant because the electric field is constant.

The motion will be similar to that of a projectile but the parabola will curve upwards.

Answer 3

1.)~5*10^-8 sec.
2.)the electron is deflected in the south direction finally it makes an angle of
\[\tan^{-1} 2\] with the horizontal x axis
the motion is a non standard parabola opening towards the negative x axis
3.)perpendicular component of velocity is 8*10^6m/s
4.)the speed is ~9*10^6 m/s
5.)\[\tan^{-1} 2\]
6.)parabola