Physics XI Content
Electrostatics- Old is Gold
- What do you mean by one electron volt?
- No two lines of force in an electric field ever intersect each other. Why?
- A man inside an insulated metallic cage does not receive a shock when the cage is highly charged. Explain.
- Why are sharp edges or points avoided in electrical machines?
- A charged conical conductor loses its charge earlier than a similarly charged sphere. Why?
- Why can more charge be placed on a metal if it is highly polished than when its surface is rough?
- Explain the phenomenon of action point in a charged conical sphere.
- What is meant by relative permittivity? What is its minimum value?
- Prove 1V/m = 1N/c
- A comb run through one’s dry hair attracts bits of paper. Why?
- If the electric field is zero throughout a certain region of space, is the potential also zero in the region or not? Explain.
- Some of the free electrons in a good conductor (such as a piece of copper) move at the speed of 10^6 m/s of faster. Why don’t these electrons fly out of the conductor completely?
- What do you mean by quantization of charge?
- What do you mean by charging by conduction and charging by induction?
- More charge can be stored on a metal if it is highly polished than when its surface is rough, why?