Hi everyone,
Could any one solve the following problem for me??? it can be found on the edexcel a2 physics book p.41 Questions 4.
4. In the electron beam of a CRO, electrons are accelerated through a potential difference of 3000V which is set up between electrodes 3cm apart.
a)Calculate the electric field strength, assuming it is a uniform field
b) How fast will the electrons be moving when htey emerge from this field?
Im having problems with (b), the answer 1.62 x 10^7 m s-1 while my calculations are double it i.e. 3.25X10^7ms-1
Thx in advance!!