Computer Studies
Answer
A mouse is a pointing device. It is connected to the CPU. It consists of a roller at the bottom on which the upper part rolls. An optical mouse may not contain a roller but has a light source at the base to detect the position of the cursor.
A mouse has two or three buttons and a scroller. It moves on a soft rubber pad. With the movement of the mouse, a pointed arrow moves on the screen. The arrow on the screen is used to select items from the menu. The mouse cursor is taken to the desired place and then clicked to get the task done.
Related Questions
There are some devices in a computer system which are used to give out the result of data processing. A popular output device about which you would be well aware of resembles a TV screen. In case, the output is to be displayed on a big screen for showing it to numerous people, an LCD projector is used. Other than these devices, we can also use printers (impact and non-impact) to produce the output on paper.
Based on the above case, answer the following questions:
(a) Which of the following devices resemble a TV screen?
- Touch sensor
- VDU
- MCB
- All of the above
(b) Which device produces result on paper with hammering effect?
- LCD projector
- Laser printer
- Dot Matrix printer
- Inkjet printer
(c) Which of the following devices produce result without making any sound?
- Impact printer
- Character printer
- Dot Matrix printer
- Laser printer
(d) Which of the following devices is used to display presentation in a hall or a gallery?
- Digital camera
- Laptop screen
- LCD projector
- Seven segment display
Define SD card
Define Scanner
Define Visual Display Unit