1. Short answer conceptual questions. (2pts each) a. What is a capacitor and what are they used for? b. How do you charge a capacitor? 0. Explain the charging process when an uncharged capacitor is connected to a battery. d. What is a dielectric material? e. What function does it serve to placing a dielectric between the plates of a capacitor? f. What is a typical capacitance range? 9. Define electric current without mathematical definition. h. What is the direction of current in a circuit? i. What is a typical drift speed? j. What is the number density? k. What is the current density? |. What does the conductivity of a material imply? m. State the formal definition of Ohm's Law. n. What is an EMF? 2. Prove, by direct integration, that of the total energy drawn from a battery in an RC-circuit during charging, half ends up dissipated in the resistor and half ends up stored in the capacitor. (10 pts)