Download Experiment 5: DC Circuits - Principles Physics: Electricity and Magnetism | PHYS 0004B and more Lab Reports Physics in PDF only on Docsity! Physics 4B DC DC Circuits Introduction This experiment will investigate an important property common to all electrical circuits known as resistance. The relationship between resistance, current and potential difference (Ohm's Law) will be examined and utilized. The experimental objectives of this four-part activity are: Part 1: To measure the resistance of test leads Part 2: To learn how to wire a circuit on a Proto-Board and to study the effects of ammeters and voltmeters in a circuit. Part 3: To learn how to wire series and parallel circuits. Part 1 Measure the average resistance of a test lead to 2 significant figures. Describe the method used to make this measurement and record your results below. Note how the resistance value changes as you increase test leads. Number of test leads used _______________ Total resistance of test leads _______________ Part 2 In this part, you will learn how a “PROTO-BOARD” is “bused”, and how it’s used to build a simple circuit with an ammeter and a voltmeter. 1. Using an ohmmeter, determine how the bus lines are connected on the PROTO-BOARD. Then use red or blue ink and a ruler on the diagram below to indicate the connections. 1 Experiment 5 Last printed 1/10/2006 09:11:00 AM 2. Build the following circuit on the PROTO-BOARD (avoid using alligator clips). Fig. 4.1 Use red or blue ink and a ruler in the diagram below to indicate the electrical connections for the above circuit. Measure and record the current through the resistor. I1 = ____________A 3. Now wire a multi-meter (set as a voltmeter) across the resistor. Notice the change on ammeter. I2 = ____________A (Draw the meter in the diagram above). Fig. 4.2 2 R=800-1600 Value to be determined by instructor A 1.5VV Battery 1.5VV Battery R=800-1600 Value to be determined by instructor V A
