A unit of charge, coulomb, is repelled away by an insulating rod. also: * If the object is repelled away from an ampere/second the rod we can conclude: * half an ampere.second ~2 an ampere/meter* 2 the rod is positively charged an ampere.second the rod is negatively charged the rod as an insulator The charge of an electron has a the rod is a conductor magnitude in the order of: * Two small charged objects are 10~23 C attracted to each other with a 10^-23 C force F and a separation distance 10~19 C 10^-19 C d. The charge on each object is reduced to one-fourth of its For a body to be negatively original value while the distance charged, it has to: * between them is reduced to d/2. have more atoms The electrostatic force becomes: * have less atoms have more electrons F remove some electrons F/2 F/4 A hard rubber rod is given a F/8 negative charge by rubbing it with The force acting on a test charge wool. Which of the following took is related to: * place? * Applied force there is a transfer of positive charges Gravitational force from rod to wool Electrostatic force there is a transfer of negative charges Electric field from rod to wool there is a transfer of negative charges The units of the electric field are: from wool to rod N.C-2 A conductor is different from an C/N N insulator with the same number of N/C atoms when there more available: * An isolated point charge with a charge of 2x10^-9 C is in a free atoms electrons vacuum. What is the electric field free electrons at a distance of 10cm from that protons point charge? * A positively charged object 1.8 N/C suspended by a string was 18 N/C 180 N/C