(a) Cathode rays:
(i) Are negatively charged particles
(ii) In field free space travel in straight line.
(iii) Are deflected by electric and magnetic fields.~(b) The intensity of the cathode rays may be increased by increasing the current through the filament. The energy of the cathode rays may be increased by increasing the p.d. between the anode and the cathode i.e. the anode potential.
