Which among the following units is used to count the speed of modern printers?

Correct option is D

The correct answer is option (d): PPM (Pages Per Minute)
Explanation:
PPM (Pages Per Minute):
This is the standard unit used to measure the speed of modern printers. It indicates how many pages a printer can produce in a minute, providing a clear and practical measure of its performance. Faster printers have higher PPM ratings.
Explanation of Other Options:
A. LPM (Lines Per Minute):
This unit is used to measure the speed of line printers (older printing technology), which print text line by line, rather than full pages. It is not used for modern printers.
B. BIT (Binary Digit):
A bit is a fundamental unit of information in computing and telecommunications, representing either 0 or 1. It is unrelated to measuring printer speed.
C. CPM (Characters Per Minute):
This unit measures the speed of devices like typewriters or older printing systems, which print one character at a time. It is also not relevant for modern printers.
Information Booster:

Types of Printer:

• Inkjet Printers:
  Use liquid ink to spray droplets onto paper.
  Ideal for high-quality color prints (photos and documents).
  Slower and costlier per page than laser printers.
  
• Laser Printers:
  Use toner (powder) and heat to print.
  Best for high-speed and high-volume printing.
  Cost-effective for text-heavy documents.
  
• Dot Matrix Printers:
  Impact printers that use pins to strike an ink ribbon against paper.
  Suitable for printing forms or receipts but noisy and low-quality output.
  
• Thermal Printers:
  Use heat to print on special thermal paper.
  Common in receipts, labels, and tickets.
  Fast and quiet, but prints can fade over time.
  
• 3D Printers:
  Create three-dimensional objects by layering materials like plastic or resin.
  Used in industries like manufacturing, healthcare, and prototyping.