What is the velocity of a beam of electrons that goes undeflected when passing through perpendicular electric and magnetic fields of magnitude 6800 V/m and 6.9×10−3 T , respectively?

The velocity of a beam of electrons is .

Explanation:

Given that,

Electric field,

Magnetic field,    

When electric and magnetic field both act on the particle, the net force is given by :

If the electron moves undeflected, F = 0

So,

So, the velocity of a beam of electrons is . Hence, this is the required solution.

graph slopes whilst gas cools, then it is flat whilst conensation to liquid happens, the coolong liquid then graphs as a slope when it solidifies graph is flat

latent heat

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.