Question

A CRO can display _________

(a) AC signals

(b) DC signals

(c) Both AC and DC signals

(d) Time-invariant signals

The question was posed to me in a job interview.

This is a very interesting question from Advanced Problems on CRT and CRO in section Oscilloscopes of Electrical Measurements

Answer 1

Right option is (c) Both AC and DC signals

To elaborate: A Cathode Ray Oscilloscope cannot measure or display Time invariant signals. However, it can measure both AC and DC signals.