Question

1 The electron beam in a television tube consists of electrons accelerated from rest through a potential difference of about 20 000V. What is the speed of the electrons? (Ignore relativistic effects). Electron rest mass is
9.11×10−31
kg and electronic charge is
1.6×10−19 C.

8.4×107
m/s

3.8×106
m/s

6×106
m/s

4.7×107
m/s