railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical and Electronics Measurements Cathode Ray Oscilloscope
The deflection of an electron beam on reducing preaccelerating anode voltage to half and making deflecting plate voltage double with initial electron beam on CRT screen as 5 mm is
1
5 mm
2
10 mm
3
20 mm
4
2.5 mm