4. A charge q is placed in the cavity of a conductor as shown below. Will a charge outside the conductor experience an electric field due to the presence of q?
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- Suppose you are 1 cm away from an infinite flat sheet of charge +Q. At that point you measure an electric field E. If you measure the electric field at a point 3 cm away, it will be O a. E o b. E O c. a d.A rubber rod is rubbed with a piece of fur and, as a result, the rubber rod has a negative charge. What happened? O Protons were removed from the rod. O The fur became negatively charged. O Electrons were added to the rod. O The fur was left neutral.A mass of 8 X 10-24 kg has a charge of 4|e| where e is the charge on an electron. a) What is its KE at 4% of the speed of light? b) What is this in eV? c) What is the voltage needed to obtain this energy?
- The electric field strength at a point in space near a point charge source is 5000 N/C. How does the field strength change if the source charge has doubled charge? If we keep the source charge the same but half the distance to the point charge, how does the electric field change?Long highway tunnels must have air cleaners to remove dust and soot coming from passing cars and trucks. In one type, known as an electrostatic precipitator, air passes between two oppositely charged metal plates, as shown. The large electric field between the plates ionizes dust and soot particles, which then feel a force due to the field. This force causes the charged particles to move toward and stick to one or the other plate, removing them from the air. A typical unit has dimensions and charges asshown. What is the electric field between the plates?A rubber rod is rubbed with fur so that the fur becomes positive. The fur is then used to charge a metal sphere. The charge on the metal sphere will benegative if charged by polarization.neutral. positive if charged by polarization.negative if charged by contact.negative if charged by induction.