S L Arora Solutions for Chapter: Electrostatic Potential and Capacitance, Exercise 2: VERY SHORT ANSWER CONCEPTUAL PROBLEMS

Why is it that a man sitting in an insulated metal cage does not receive any shock when it is connected to a high voltage supply?

A large hollow metallic sphere $A$ is charged positively to a potential of $100$ volt and a small sphere $B$ to a potential of $50$ volt. Now $B$ is placed inside $A$ and they are connected by a wire. In which direction will the charge flow?

Why should the radius of the sphere of a Van de Graaff generator be sufficiently large?

Why is Van de Graaff generator enclosed inside an earth connected steel tank filled with air under pressure?

Why is there loss of energy when two charged conductors at different potentials are connected by a conducting wire?

During lightning, it is safest to sit inside a car rather than near a tree. Why?

Is there some way of producing high voltage on your body without getting a shock?

Two metallic spheres of radii $R$ and $2 R$ are charged so that both of these have same surface charge density $\alpha$. If they are connected to each other with a conducting wire, in which direction will the charge flow and why?