Midterm Studysheet Physics Lab 204 Be able to answer questions on all quizzes. Lab 1 and 2: Be able to draw electric field and equipotential lines for a configuration of charges. Lab 3: Be able to use Ohm’s Law to calculate V, I, or R. Given data for V, I, or R, be able to graph the data and determine the unknown variable. Given the equation and appropriate data, be able to calculate resistivity. Lab 4: Be able to solve for the equivalent resistance and the voltage and current for each resistor in a series or parallel circuit. Lab 5: Be able to describe the purpose, use, and construction of a voltmeter, ammeter, and galvanometer. Describe how to multiply the range of a voltmeter or ammeter. Be able to use Ohm’s Law or given equations to calculate V, I, or R in a voltmeter, ammeter or multiplier. Lab 6: Understand how a Wheatstone bridge works. Given the diagram for a Wheatstone bridge, calculate the unknown resistance, given Rx = R (Rb/Ra). Understand how resistance is related to the physical properties of a wire, given R = ρ(L/A).