Lab 2B.docx - Group People(please print names 1 Group Leader 2 3 4 5 Lab 2B DC Circuits Containing Resistors and Capacitors Charging and Discharging a

# Lab 2B.docx - Group People(please print names 1 Group...

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Group #:________________ People (please print names) 1. Group Leader____________________________ 2.____________________________ 3.____________________________ 4.____________________________ 5.______________________________ Lab 2B: DC Circuits Containing Resistors and Capacitors - Charging and Discharging a Capacitor Objectives: 1. Use the supplied equipment to make a stable DC series circuit containing a resistor, a capacitor and a DC voltage source and measure the voltage across the capacitor. 2. Observe and qualitatively describe the charging and discharging (decay) of the voltage on a capacitor. 3. Experimentally determine the time constant τ for the decay. 4. Compare calculated values with measured results. Materials: 1. A 9-V battery 2. A resistor 3. A capacitor 4. A multimeter 5. 6 connecting wires with alligator clips Experimental Procedure For this part of the lab you will need to make periodic measurements of changing quantities using the supplied multimeter. A convenient time interval will be one measurement every 5 seconds or so. Select a method to prompt yourself to write down a series of measurements at the proper times. For example, you could recruit an assistant with a watch to prompt you to record values. Alternatively, you can download a free metronome application for your phone which will beep every 5 seconds. There may be other viable solutions which you can use. Pick your favorite timing technique and test it by making a dozen measurements from the multimeter at 5 second intervals. It makes no difference what you measure for this test.

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• Summer '11
• Stanischevsky
• Resistor, RC circuit, Series and parallel circuits, Group Leader____________________________

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