Question 31: NCERT Solutions for 12th Class Physics: Chapter 2-Electrostatic Potential and Capacitance

- Two large conducting spheres carrying charges Q
_{1}and Q_{2}are brought close to each other, is the magnitude of electrostatic force between them exactly given by r is the distance between their centres? - If coulomb’s law involved 1 /r
^{3}dependence (instead of 1/r^{2}), would Gauss’s law be still true? - A small test charge is released at rest at a point in an electrostatic field configuration. Will it travel along the field line passing through that point?
- What is the work done by the field of a nucleus in a complete circular orbit of the electron? What if the orbit is elliptical?
- We know that electric field is discontinuous across the surface of a charged conductor. Is electric potential also discontinuous there?
- What meaning would you give to the capacitance of a single conductor?
- Guess a possible reason why water has a much greater dielectric constant {- 80) then say, mica (= 6).

Solution:there. As E = 0, so = 0 or V = constant.

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NCERT Solutions for 12th Class Physics: Chapter 2-Electrostatic Potential and Capacitance