Van de Graaff generator
A moving belt carries charge to a metal dome: the potential rises as V = Q/4πε₀R until corona discharge at E ≈ 3 MV/m or a spark jumps to a grounded sphere. Change dome radius, belt current and gap.
About this experiment
| Subject | Physics |
|---|---|
| Class | 12 |
| Chapter | 2. Electrostatic Potential and Capacitance |
| NCERT section | 2.14 |
| Level | Advanced (JEE / Olympiad) |
| Time | about 12 minutes |
| Access | Included in a PractiSci plan |
What you do in the lab
Change the controls and watch the physics behave in real time in 3D. Live readouts and graphs show the numbers behind it, and the Learn tab has the theory, procedure, observations and viva questions. Works on a phone or a laptop, in English and Hindi.
Topics: Van de Graaff · high voltage · dielectric breakdown · corona · potential