 channel for physics please subscribe my channel hello everyone and welcome back to another episode of physics partner today we are going to discuss a science wonder called when the graph generator a machine to make charges was invented in 1929 by a young American called when the graph some over 30 meter high based on this idea have been built to produce extremely high potential differences before proceeding to his function I want to recall an amazing clip of comedy legend mr. Bean let's have a look when the lady touched this Vendi graph generated dome her hair were straight and apart from each other and of course mr. Bean with his famous style he start trying to touch the Vendi graph generator to feel the same experience but unfortunately there was no change in his hair he asked someone like to check with and he didn't find any changes why the lady here was far away from each other the lady here was charged with like charges and like charges are repel each other where unlike charges are at practice other this is due to an electrostatic force let's discuss how Vendi graph generator works when the graph generator experiments are all based on the fact that like charges ripple a Vendi graph generator pulls electron from the earth moves them along a belt and stored them on a large sphere these electrons ripple each other and try to get as far away from each other as possible is spreading out on the surface of the sphere the earth has lots of room for electrons to spread out up on so electron will take any available path back to the ground the grounding rod is a smaller sphere attached by a wire to the earth it's provide a convenient part of electrons to move the ground if you bring the ground rod closer enough to the large sphere the electrons rip through the air molecules in order to jump on to the grounding rod creating a spark and crackling noise I hope you can hear this sound the rubber belt inside the Vendi graph generator runs between two rollers made of different materials causing electron to transfer from one roller to the rubber and from the rubber on to the other roller by the triboelectric effect brushes at the top and bottom provide a source and sink for these charges and the top brush is electrically connected to the Vendi graph dome and so the charge will spread out across the dome let's do some more experiment to understand how it works and what happens if I attach one stand with very light here material and if I start the Vendi graph generator so you can see negative charges are built up in the here resulting they start repelling each other and therefore apart from each other if I do the same with the positive charge and repeat this experiment there will be the same results because again the positive charges are start repelling each other now I attach two different stands with different charges one is for it and one is negative let's see what will happen so when we do the same thing you can see the attraction between the positive and negative and the same time repulsion within the stand so stand itself inside it has the repulsion but it is start attracting towards the other stand if I switch the charges and repeat this experiment is again the same result negative and positive will start attracting each other if it's applied both positive charges let's see what will happen they will start repelling each other if I provide both stands negative charge the same thing will happen they start repelling each other this time I do a different experiment I place two stands with long hanger here and I'm going to given different charges to both one is positive you can see in the screen and one is negative let's try so both are attracting each other and that's why they become straight and you can easily experience the force of attraction between the unlike charges another way of demonstrate the Vendi graph generator function we can make this tremendous setup like that also when you switch on with the one negative charge you can see they are start repelling each other with the stand and the position is in front of you let's try a ping-pong ball experiment it will definitely attract why it's happens look at the charges of the ping-pong it are mixed with positive and negative when I brought it near to the dome it will start attracting because dome is provided positive charges so positive charges are repelling each other whereas the negative charges are start attracting each other you can see there in the screen negative charges are attract each other let's do an interesting experiment by switching negative and positive charges quickly look at here so what is happening here you can see the ball is quick to be switching the charges from negative to positive and very interesting tackling sound is here if I stop it it's completely discharged and become a neutral and finally the very very famous electrical fan was there which you can operate by the electrostatic machine called Vendi graph so if you apply the part of charges they start repelling each other resulting the fan is start moving Vendi graph generator is a wonderful machine and still teachers are using to demonstrate the electrostatic forces in the classes so I hope you enjoyed the video take care of yourself see you in the next video goodbye