5 Questions
What is the main difference between a sheet-fed scanner and a handheld scanner?
A sheet-fed scanner uses a motorized belt, while a handheld scanner relies on the user to move it.
How does a drum scanner work differently from a sheet-fed scanner?
A drum scanner uses a photo multiplier tube, while a sheet-fed scanner uses a sensor.
What is the primary function of a microphone in a computer?
To record audio or video tutorials
Why are joysticks preferred for arcade-type computer games?
They allow for quick and accurate movement in any direction
What distinguishes a digital camera from a computer scanner?
Digital cameras use PMT technology, while computer scanners use basic light sensors.
Study Notes
Printers
- Dot Matrix Printers:
- Used for printing duplicate copies quickly and cheaply
- Limited to situations where carbon copies are needed and quality is not important
- Low printing quality
- Low purchase cost and running costs
- Can print fairly quickly
- Robust and can operate in harsh environments
- Can produce multiple copies using self-carbonating paper
- Ink Jet Printers:
- Popular choice for home and school use
- Ink cartridges can be expensive, leading to high running costs
- Relatively inexpensive
- Produce high-quality black and white or color printing
- Slow speed compared to laser printers
- Laser Printers:
- Commonly used for fast, high-quality printing
- Non-color laser printers are more expensive than ink-jet printers
- Color laser printers are more expensive but offer high-quality output
- Quiet and fast, producing high-quality printouts
- Low running costs due to long-lasting toner cartridges
Plotters
- Devices that draw pictures on paper based on computer commands
- Different from printers, as they draw lines using a pen
- Can produce continuous lines, unlike printers which simulate lines with dots
- Multicolour plotters use different colored pens to draw different colors
- Often used in science and engineering applications for drawing building plans, printer circuit boards, and machine parts
- Fast and accurate, but relatively expensive compared to printers
- Can produce large printouts, up to the size of a small room
Headphones
- Provide sound output from the computer
- Similar to speakers, but worn on the ears, allowing only one person to hear the output
- Headsets are a combination of speakers and microphone
Learn about different types of printers like dot matrix, inkjet, and laser printers. Understand their mechanisms and typical uses in various settings.
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