class 7 note chapter 1

 Here is a Class 7 level note with simple definitions, examples, and images for better understanding 👇

📘 Computer Ports & External Hardware (Class 7 Notes)

🔌 What is a Port in Computer?

A port is a connection point in a computer where external devices are plugged in.

👉 Example: You connect a keyboard or pen drive using a port.

🖥️ Types of Computer Ports

🔹 HDMI Port

  • Used to connect monitor, TV, or projector

  • Sends both audio + video

👉 Example: Connecting laptop to TV

🔹 USB Port

  • Used to connect pen drive, keyboard, mouse

  • Most commonly used port

👉 Example: Plugging a pen drive

🔹 Ethernet Port

  • Used for internet connection using cable

👉 Example: LAN cable connection

🔹 Display Port

  • Used to connect monitor with high-quality video

🔹 Audio Jack

  • Used for headphones, speakers, microphone

🔹 Thunderbolt Port

  • Very fast port for data transfer and display

🔹 PS/2 Port

  • Old type port for keyboard and mouse

🖱️ External Hardware Devices

👉 Devices connected from outside the computer

⌨️ Keyboard

  • Used to type letters and numbers

🖱️ Mouse

  • Used to point, click and select

📠 Scanner

  • Converts paper documents into digital form

🎤 Microphone

  • Used to record sound

📷 Webcam

  • Used for video calling

🎮 Joystick

  • Used to play games

✍️ Graphic Tablet

  • Used for drawing on computer

🖊️ Light Pen

  • Used to draw directly on screen (old technology)

🖥️ Monitor Types

🔹 CRT Monitor

  • Old, bulky monitor
    👉 Example: Old desktop computers

🔹 LCD Monitor

  • Flat and light
    👉 Example: Office computers

🔹 LED Monitor

  • Better quality and energy efficient
    👉 Example: Modern computers

🖨️ Printer Types

🔹 Inkjet Printer

  • Uses ink
    👉 Example: Home printing

🔹 Laser Printer

  • Uses toner
    👉 Example: Office printing

🔹 Dot Matrix Printer

  • Uses pins
    👉 Example: Bill printing

🔊 Speakers & Headphones

  • Speakers → Output sound loudly

  • Headphones → Personal listening

👉 Example: Listening to music

💾 Storage Devices

🔹 HDD (Hard Disk Drive)

  • Stores large data inside computer
    👉 Example: 500GB, 1TB storage

🔹 SSD (Solid State Drive)

  • Faster than HDD
    👉 Example: Laptop storage

🔹 CD (Compact Disc)

  • Stores data using laser
    👉 Example: Music CDs

🔹 DVD

  • More storage than CD
    👉 Example: Movies

🔹 Pen Drive

  • Small and portable
    👉 Example: Carry files

🔹 Blu-ray Disk

  • Very high storage
    👉 Example: HD movies

✅ Conclusion

  • Ports help connect devices

  • External hardware helps input/output

  • Storage devices save data

If you want, I can convert this into:
✅ PDF for students
✅ MCQ questions
✅ Short answer questions

Just tell me 👍

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