ABSTRACT
Wind moves clouds and air balloons. Meteorologists use wind maps to analyze the weather pattern and to make a forecast. Planets, suns, and galaxies exert gravitational force on each other. Astronomers can analyze their interactions and predict the movement of astronomical objects. Likewise, electrical charges exert electric force on one another via electric fields, influencing the charges’ motion. More precisely, the electric force https://www.w3.org/1998/Math/MathML"> F → electric https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003397496/c9619a4c-33ea-4757-afe2-97610a8ab4e4/content/math6_1.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> on a charge q located at a location is proportional to the electric field https://www.w3.org/1998/Math/MathML"> E → https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003397496/c9619a4c-33ea-4757-afe2-97610a8ab4e4/content/math6_2.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> at that exact position.
