Q.1(a) Describe the operating principle of the Van de Graaff generator and state a typical engineering application of this machine. Two equal charges, each of magnitude 1.7 µC are separated 40 cm...

Extracted text: Q.1(a) Describe the operating principle of the Van de Graaff generator and state a typical engineering application of this machine. Two equal charges, each of magnitude 1.7 µC are separated 40 cm apart in a medium. Find the dielectric constant of the medium. (b) Explain with reasons, what happens when two wires of negligible mass carrying direct current in the same direction are held close to each other in a dielectric medium. Support your explanation with a suitable diagram (c) Describe the mechanism of conduction of electricity in a metal. Show that the curent / carried by a conducing wire of crass- sectional area A is I=ngAva Given that each carrier with a charge q travels with a drift velocity Va, and nis the number density.