Class 7th to 8th

Make a conductivity Tester Construction Of conductivity Tester Construction Of conductivity Tester  This is video tutorial of building of conductivity tester for different materials Material : Thick copper wire LED AA size dry cell 2 Scotch Tape Rubber Band Cutter Sand Paper Pliers Ruler For construction steps watch Video. Science of Conductivity Tester A conductivity…

How To Make a Telescope at Home (Video Urdu) In its essence, a telescope is an instrument that makes a far away object look closer. To do this, a telescope has a device that collects light from a distant object (objective lens or primary mirror) and brings that light (image) to a focus where a…