10. Electron travelling though two horizontal plates In the diagram P1 and P2 are two parallel horizontal plates in a vacuum and have a potential difference of V volts
maintained between them, the upper plate being positive. Also, there is a horizontal magnetic field as shown.
x
x
x
xd
electron
beam
P2 z
x
x
NNN
NNN
x
* *
x
The direction of the magnetic force acting on the electron is
Select one:
In the same direction the electron is travelling
O a
O b. Down the page
Oc. Out of the page
Od Into the page
O e. Up the page
Of in the opposite direction to the electron

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.