Essay --

Study Information for Test 1 Contents 1. Equation Sheet 2. Test Coverage 3. Test Format 4. Practice Questions Equation Sheet: The following will be provided on a tear-off sheet Equations: Constants: | e | = 1.60 x 10-19 C P = i V From 205: Power = Test Coverage Chapter 26 (Capacitance) 26.1 state and use the definition of capacitance; give the SI unit of capacitance. 26.2 sketch parallel plates charged by a battery and apply the formula for parallel plate capacitance. 26.3 explain why capacitance increases when parallel plates are filled with an insulating material; calculate parallel plate capacitance including the dielectric constant. 26.4 define series and parallel connections of capacitors; use these rules to reduce a capacitor circuit to a single capacitor and battery (if possible); determine the charge and voltage of each capacitor in such a circuit. 26.5 calculate the energy stored in a capacitor. Chapter 27 (Current and resistance) 27.1 define electric current and state the convention for its direction; give the SI unit of current. 27.2 define electric current density for current uniformly distributed over a cross section of wire. 27.3 state and use Ohm's law. 27.4 calculate the power dissipated in a resistor; calculate the resistance of a hot plate of a given wattage and line voltage. Chapter 28 (Circuits) 28.1 describe the functioning of a simple circuit consisting of a resistor and a battery using the analogy to fluid flow. 28.3 define series and parallel connections of resistors; use these rules to reduce a resistor circuit to a single resistor and battery (if possible); determine the current and volt... ...oltage loop rule to determine the charge Q2. †¢ Two sheets (A & B) carrying charge densities of -ÏÆ' and +ÏÆ' are placed at x = 1 cm and x = 7 cm (See the diagram below. Note that the horizontal and vertical scales are different). Two conducting slabs with widths of 1.5 cm and 0.5 cm are inserted between the charged sheets at the locations shown in the diagram. (Ignore fringing effects.) (a) Draw a graph that represents the electric potential as a function of x for x between 0 and 8 cm. (b) Draw a graph that represents the electric field as a function of x for x between 0 and 8 cm. (c) Calculate the potential difference between sheets A and B. Explain how you determined your answer. (d) Suppose the two slabs are connected with a wire. Will the potential difference be greater, smaller or equal to your answer in part (c)? Explain your reasoning.