Chapter 6 CATHODE RAY OSCILLOSCOPE CRO MCQs 10 min Score: 0 Attempted: 0/10 Subscribe 1. . The cathode of a C.R.O. is usually coated with (A) Alkali metals (B) Barium or strontium oxide (C) Copper oxide (D) Tungsten or thorium oxideShow All Answers 2. . The input impedance of C.R.O. is (A) Zero (B) Around 100 ohms (C) Around 1000 ohms (D) Around one mega-ohmsShow All Answers 3. . A C.R.O. can be used to measure (A) A.C. voltages only (B) Any of the above (C) Frequency (D) D.C. voltages onlyShow All Answers 4. . A cathode ray oscilloscope consists of (A) All of above (B) The deflecting plates (C) A fluorescent screen (D) The electron gunShow All Answers 5. . In C.R.O, the grid is connected to the (A) Negative potential (B) Positive potential (C) Alternating current (AC) source (D) Direct current (DC) sourceShow All Answers 6. . An instrument which is used to display the magnitudes of changing electric currents or potentials is called (A) Cathode-ray oscilloscope (B) Gastro-scope (C) Microscope (D) CystoscopyShow All Answers 7. . Who among the following developed the CRT (Cathode Ray Tube)? (A) Charles Darwin (B) Thomas Alva Edison (C) Ferdinand Braun (D) None of the aboveShow All Answers 8. . The inside of the Cathode Ray Tube is coated with what material? (A) No coating (B) Fluorescent powder (C) Phosphorus (D) None of the aboveShow All Answers 9. . Which among the following is a part of the Cathode Ray Tube? (A) Control Electrode (B) Electron Gun (C) Focusing System (D) All of the AboveShow All Answers 10. . CRT stands for, (A) Cathode Random Tunnel (B) Cathode Ray Tube (C) Cathode Random Tube (D) Cathode Ray TunnelShow All Answers
