Get a board a marker and a wipey thing Neutral objects always have equal numbers of which subatomic particles? What is the most massive positively charged particle? A) electron B) Proton C) Positron D) Neutron A negative rod is brought near a neutral pith ball. What happens to the charges in the pith ball? If a negatively charged object is brought near the knob of a neutral electroscope what will the leaves do? When hair is combed with a hard rubber comb, the hair becomes positive. Why? 6. A neutral rubber rod is rubbed with fur and acquires a -2 x 10-6 Coulomb charge. What is the charge on the fur? Draw a neutral electroscope being charged by conduction In the charging of a solid, charge transfer is accomplished by the displacement of what? 9. Metal sphere A has a charge of -2 units and an identical sphere B has a charge of -4 units. If the two spheres are brought together and then separated, what will be the charge on sphere A? The Milliken oil drop experiment showed the existence of what? 11. How many Coulombs are in three elementary charges? (1.6 x 10-19C) x 3 = If the charge on each of two small spheres, a fixed distance apart, is doubled, how does the force of attraction between the charges change? If the charge on one object is quadrupled and the charge on the other object is doubled, what happens to the force of attraction between the two charges? +1 +1 +1 +1 A What is the direction of the electric field at point A? A hollow metallic sphere is positively charged. The field at the center of the sphere due to this positive charge looks like what? What is18 the magnitude of the electric field intensity at a point in the field where an electron experiences a 1.0 Newton Force? 6.25 x 10 N/C A and B are electron locations. Which has more potential difference (Voltage)? +++++++++++++ A B ------------------------ How much energy is required to move 3.2 -19 x 10 Coulombs of charge through a potential difference of 5 volts? What is a capacitor used for? Describe practical uses of statics. Name three things to avoid in a lightning storm What was this machine used for?