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Phys2Lab10 - LnVo – t RC Procedure Connect the circuit...

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Matthew Malek Lab Partners: Jon and Christina Lab #10 RC Circuits: Discharge of a Capacitor Objectives: We will determine the time it takes a capacitor to charge and discharge through a resistor. Theory : When a capacitor is connected in a circuit and the power is turned on, the cap would charge up, like a battery. When the source is turned off, the capacitor slowly discharges. The voltage on the capacitor decreases at a rate that is proportional to the voltage at that moment. V = Vo e^-(t/RC) When t = RC the exponent equals 1: V = Voe^-1 = .368Vo You could also that the log of this:
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Unformatted text preview: LnVo – t / RC Procedure : Connect the circuit with a capacitor in it. Pick some resistance that makes RC about 1.5 minutes. Connect the volt meter and power the circuit. Record maximum voltage across the capacitor, then turn off the power and record how long it takes to discharge the capacitor. Repeat with new cap and new resistor. Record again. Conclusion Both capacitors acted normally during this lab. The times on the graph matched the calculated ones. Maybe the resistance in the voltmeter causes some error on the results....
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