engineering recuitment GATE EE 2023-24 Test Series Electrical and Electronics Measurements Cathode Ray Oscilloscope Construction of CRO
The input impedance of a CRO is equivalent to a 1 MΩ resistance in parallel with a 45 pF capacitance. It is used with a compensated 10 to 1 attenuation probe. The effective input capacitance at the probe tip is
1
4.5 pF
2
5 pF
3
45 pF
4
450 pF