Physics of a Light Bulb1

Physics of a Light Bulb1 - Physics of a Light Bulb TA: Jie...

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Physics of a Light Bulb TA: Jie 3/20/2008 Abstract: Using a DMM, a DC power supply, a light bulb, and a computer interface with voltage sensors, the properties of a light bulb and of Ohm’s law were tested
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Objectives: To measure the relation between voltage and current in a small flashlight bulb; to determine the temperature of the filament; to verify the Stefan-Boltzmann law of radiation. Experimental Procedure: First the circuit had to be set up. The interface was connected to the light bulb which was connected to the power supply on both ends. The interface was then connected to channel A and the positive and negative terminals of the light bulb were connected to channel B. The pre-set experiment file for this lab was then opened on the computer. The first experiment was to find the ambient resistance for the cold light bulb filament. The power supply was initially set to zero volts and the start button was clicked in the data studio file. Then, the voltage was slowly but steadily increased until it reached 10 volts and the computer automatically stopped recording. Once the graph was formed, the section of 0.08 A (current) was selected and a linear fit was
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This note was uploaded on 05/07/2008 for the course PHY 114 taught by Professor Tsen during the Spring '08 term at ASU.

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Physics of a Light Bulb1 - Physics of a Light Bulb TA: Jie...

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