1. When a glass rod is rubbed with silk it (the rod) becomes positively charged. This happens because
1. Electrons are created on the rod.
2. Electrons are transferred from the silk to the rod.
3. Protons are transferred from the silk to the rod.
4. Protons are transferred from the rod to the silk.
5. Electrons are transferred from the rod to the silk.
2. When rubber rod is rubbed with a piece of fur it (the rod) becomes negatively charged. What happens to the fur?
1. It remains neutral.
2. It becomes positively charged.
3. It becomes negatively charged, too.
4. It depends on the type of fur.
3. When two objects are rubbed together, which particle is most probable to be transferred?
1. Proton
2. Neutron
3. Nucleus
4. Electron
4. Two charges that are 1 meter apart repel each other with a force of 2 N. If the distance among the charges is increased to 2 meters, the force of repulsion will be
1. 1 N
2. 0.5 N
3. 8 N
4. 4 N
5. If the charge on each of two small spheres a fixed distance apart is halved, the force of attraction among the spheres will be _____
1. Doubled.
2. Quadrupled.
3. Halved.
4. Quartered.