railway RRB Technician Grade 1 Mock Test 2024 Electrical and Electronics Measurements Cathode Ray Oscilloscope
Which of the following options about cathode in cathode ray tube is INCORRECT?
1
The amount of electrons generated by the cathode depends on its heating temperature, not on surface area.
2
It has a layer of barium and strontium oxide deposited on its end.
3
It is cylindrical shaped.
4
It is used to obtain high emission of electrons at moderate temperature.