Q. Laser Jet printer speeds are measured in pages per minute (ppm) what do we use to measure dot-matrix printers?
✅ Correct Answer: (D)
characters per second
Explanation:
Dot-matrix printers are impact printers that print by striking an ink-soaked ribbon against the paper. Their speed is typically measured in characters per second (cps), reflecting how many individual characters they can print each second.
- (A) Lines per inch refers to resolution or spacing, not speed.
- (B) Lines per sheet is not a standard measurement.
- (C) Characters per inch refers to density or resolution, not speed.
Therefore, (D) characters per second is the correct unit to measure dot-matrix printer speed.
Explanation by: Mr. Dubey
Dot-matrix printers are impact printers that print by striking an ink-soaked ribbon against the paper. Their speed is typically measured in characters per second (cps), reflecting how many individual characters they can print each second.
- (A) Lines per inch refers to resolution or spacing, not speed.
- (B) Lines per sheet is not a standard measurement.
- (C) Characters per inch refers to density or resolution, not speed.
Therefore, (D) characters per second is the correct unit to measure dot-matrix printer speed.