Q: 11.20 (a) Estimate the speed with which electrons emitted from a heated emitter of an evacuated tube impinge on the collector maintained at a potential difference of with respect to the emitter. Ignore the small initial speeds of the electrons. The specific charge of the electron, i.e., its is given to be .
The kinetic energy of an electron accelerated through Potential Difference V is K=eV where e the electronic charge.
Speed of the electrons after being accelerated through a potential difference of 500 V will be
Specific charge is e/me=1.3661011C/kg