Draw a neat labelled diagram of van de graaff generator. Give the principle of its working.

Explanation

Principle: Spherical conductor holds the charge for a long period.
* The charge distribution wil be uniform
* Due to charge induction, the outer surface of the conductor will be charged
* Discharge action of spiked bristles enables quick charging and discharging of the conveyor belt.
Working: MB1 gets induced with a low positive voltage and due to induction the belt gets positively charged MB2 gets charged negative induction and delivers the positive charge on the surface of the conductor. the negative charges are sprayed back to the belt neutralizing it. a huge amount of charge can be stored by continuously working on the conveyor belt. To get negative charge on the conductor, negative potential is supplied near the MB1: By working on two VAn der Graaff generator, +`10^(6)V and -10^(6)V`, a.p.d. of `2xx10^(6)V` can be obtained. van der Graaff generator converts low DC into high DC.