PHY 114 Lab Report 4: Physics of a Light Bulb. Arizona State University
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PHY 114 Lab Report 4: Physics of a Light Bulb. Arizona State University.ABSTRACT: The objective of this lab was to understand and be able to compare the relation between voltage and current in a sm... all flashlight bulb and to verify the Stefan Boltzmann law of radiation. By using a circuity involving a DMM, a DC power supply, a light bulb, and a computer interface with voltage sensors, several plots were made to help determine specific values in the circuit. An internal resistance of 2.67 Ohms was found on the filament of the bulb. The Stefan-Boltzmann law, P=A*T^4, says that power output increases exponentially by a power of 4 with increasing temperature. The graph should be linear and the slope should represent the exponential increase of power by 4. An experimental linear slope of 3.8 is 5% off of the theoretical value of 4, a negligible error. The Stefan- Boltzmann law was validated and the lab was completed successfully. [Show More]
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