How was Physics exam?

Students and teachers report that this year's CBSE Physics exam was of a different kind and many questions were quite new. How did you feel? How was CBSE Physics exam 2017? Any genuine problem cited will help while finalising the marking scheme. So, report the problems which you faced. Students, teachers and parents can post … Continue reading How was Physics exam?

CBSE Physics Papers (Previous years)

CBSE Physics Papers (Previous years)  With the number of posts in the blog growing, I revisited the posts and decided to classify & club a number of similar posts in a single post. This would make the site user-friendly. The users will find it easier search the posts/topics they are looking for. This will facilitate learning … Continue reading CBSE Physics Papers (Previous years)

Change in length of rubber band on cooling

Some where i read that on cooling of rubber band it expands where as when heated it contracts . Why does it happen?Full description.please   Asked Bipin Kumar Answer The rubber band actually expands when it gets colder. This occurs because of the unusual polymer structure of rubber. When the long chains get hotter and vibrate, they … Continue reading Change in length of rubber band on cooling