Designing buildings to maximize absorption of sunlight during winter and to keep the interiors cool during summer is referred to as geothermal energy collection nuclear energy collection active solar energy collection passive solar energy collection wind energy collection

The answer to this question is Passive Solar Energy Collection. Passive Solar Energy Collection is a building design where in parts of the building like windows, walls, absorbs sunlight during winter and the interiors of the building are cool during summer time. In this design, the cost of having this building may be costy.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.