railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical and Electronics Measurements Cathode Ray Oscilloscope
What is/are the main function of electron gun in a cathode ray tube (CRT)
1) To convert heat into forms of electric energy
2) To provide sharp beam of electrons
3) To accelerate the electrons
1
2 and 3
2
1 and 2
3
2 only
4
3 only