Electrostatics 1. When a nearby charged object causes a change in the distribution of charge on a neutral object, this is called an induced charge separation. Is it possible to create an induced charge separation on an insulator? On a conductor? Explain your answers. 2. Two neutral metal spheres on wood stands are touching. A negatively charged rod is held directly above the top of the left sphere, not quite touching it. While the rod is there, the right sphere is moved so that the spheres no longer touch. Then the rod is withdrawn. Afterward, what is the charge state of each sphere? Use charge diagrams to explain your answer. Coulomb's Law and Electric Forces 3. In a hydrogen atom, an electron is 5.29 x 101d m from a proton. A. Calculate the magnitude of the electrostatic force acting on the two charges. B. Is the electron attracted to or repelled from the proton? 4. A metal sphere with a charge of -3.00 JC is at a distance of 12.0 cm from another similar metal sphere with a charge of +2.00 UC. The two spheres momentarily touch, and are then returned to their original positions. A. Calculate the magnitude of electrostatic force acting on the two metal spheres after being returned to their original positions. B. If released after being returned to their original positions, would the spheres accelerate toward or away from each other 5. Two point charged objects produce an electric force of 0.0620 N on each other. What is the magnitude of the electrostatic force between the charges if the distance between them increases three times and one of the charges is doubled? 6. A 1.8 g pith ball is suspended from a thread and placed in an electric field. When placed in the electric field, the pith ball is deflected to the left so that the thread Charged rod makes a 9.50 angle with the vertical. Calculate the magnitude of the electrostatic force on the pith ball.PHYSICS DATA SHEET Constants Prefixes Used with SI Units Particles Acceleration Due to Gravity Exponential Charge Mass Near Earth....... lag| =9.81 m/s2 Prefix Symbol Value Gravitational Constant ...... G=6.67 x 10-1 N.m2/kg2 10-18 Alpha Particle.... +2e 6.65 x 102 kg atto ..... Radius of Earth Te = 6.37 x 10 m femto .... 1 10-15 Electron ... 9.11 x 10 3 kg Mass of Earth.... ......... Me = 5.97 x 1024 kg pico...... P.......... 10-12 Proton ........ :". +le 1.67 x 10-27 kg Elementary Charge ........... e= 1.60 x 10-19 C nano.... n. ........ 10-9 Coulomb's Law Constant .. k = 8.99 x 109 N.m2/C2 micro .... / ........... 10-6 Neutron....... 0 1.67 x 10-27 kg Electron Volt ................ leV = 1.60 x 10-19 J milli... ........... m............. 10-3 Index of Refraction of Air. n = 1.00 centi... C.......... 10-2 First-Generation Fermions Charge Mass Speed of Light in Vacuum. c = 3.00 x 108 m/s deci...... d.......10-1 Electron ..... ~0.511 MeV/c2 Planck's Constant ....... h =6.63 x 10 34 J.s deka .......... da..........10' h = 4.14 x 10 eV.s hecto ... h.......102 Positron .... ....... +le ~0.511 MeV/c2 Atomic Mass Unit ........ u = 1.66 x 10kg kilo ....... k K.......... 103 Electron neutrino, V........ O