Question:
The value of e me can be obtained by using a specially
Last updated: 6/2/2023
![The value of e me can be obtained by using a specially](https://media.kunduz.com/media/sug-question-candidate/20200914113934848218-1448524.jpg?h=512)
The value of e me can be obtained by using a specially designed vacuum tube The figure contains a heated filament F and an anode A which is maintained at a positive potential relative to the filament by a battery of known voltage V Electrons get emitted from the heated filament and are accelerated towards the anode which has a small hole in the centre for the electrons to pass through into a region of constant magnetic field B which points into the plain of the paper The electrons then move in a semicircle of diameter d hitting the detector cathode as shown Prove that me 8V B d B F d