😊

 In the first period I got 9D as a substitution period and I took the chapter current electricity. I taught them emf and current with the help simulations. The students were so interested to see the simulations. Then we had duty during the lunch break. After that I had class at 8 E where I demonstrated an experiment for loudness using foil paper balls and a cylinder shaped hollow vessel. To make them understand about pitch, I used a speaker to play music that contained both high pitch and low pitch.