CBSE Class 9 Answered

Dear abinash.gupta003@gmail.com 

Thanks for asking us a question in Ask the Expert section of TopperLearning.com.

Here’s a list of some of the working models which you can create based on your concept understanding.

• Generate electricity without using any fuel
• Water purifier that works using waste corn cobs
• TV remote controlled robotic wheelchair
• Making a device for controlling smoke pollution and production of electricity
• Making a solar cell
• Making a thermal power plant

However, we advise you apply your own creativity and think out of the box to create models which have practical applications as well.

Regards

Topperlearning Team.