Ramaiah's levelled his field. Somaiah's field has many up and downs. Who will get more crop yield ? Why?

Rahim removed weeds in his crop field, but David did not. Guess who get more yield why?

The fields, in which legumes are grown, get enriched with nitrogen. Why?

Rajaiah harvested corn plants in one row and wheat in another row in his crop field. What type of harvesting method that he followed ?

Answer carefully: (a) 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 Q_(1),Q_(2)//4pi epsilon_(0)r^(2) , where r is the distance between their centres? (b) If Coulomb’s law involved 1//r^(3) dependence (instead of would Gauss’s law be still true ? (c) 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? (d) 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? (e) We know that electric field is discontinuous across the surface of a charged conductor. Is electric potential also discontinuous there? (f) What meaning would you give to the capacitance of a single conductor? (g) Guess a possible reason why water has a much greater dielectric constant (= 80) than say, mica (= 6).

Why do farmers make a settle of goats and sheeps in the fields? What way it is helpful to the farmer as well as field crops?

Why do farmers dry the paddy crop after cutting them from fields?

A magnetic field set up using Helmholtz coils (described in Exercise 4.16) is uniform in a small region and has a magnitude of 0.75 T. In the same region, a uniform electrostatic field is maintained in a direction normal to the common axis of the coils. A narrow beam of (single species) charged particles all accelerated through 15 kV enters this region in a direction perpendicular to both the axis of the coils and the electrostatic field. If the beam remains undeflected when the electrostatic field is 9.0 x× 10^(-5 )V m^(-1) , make a simple guess as to what the beam contains. Why is the answer not unique?

Venkatapuram village is in drought prone area. Somaiah wants to cultivate sugarcane in his fields. Is it beneficial or not? What questions will you ask him to convey your belief.