Phys 1 Student Workbook.pdf

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Physics Labs with Computers, Vol. 1Student WorkbookP31: Magnetic Field of a Permanent Magnet 012-07000AOptional• Repeat the activity with a different type of magnet.Optional Data TableItemEquation of FitEquationOptional Questions1. Does the magnetic field strength increase or decrease as the distance from the magnet isincreased?2. How does the plot of Magnetic Field Strength vs. Distance for this magnet compare withthe plot for the original magnet?p. 228 ©1999 PASCO scientific P31
Name _____________________ Class ______________ Date _________Activity P32: Variation of Light Intensity(Light Sensor)Concept DataStudio ScienceWorkshop (Mac) ScienceWorkshop (Win)Illuminance P32 Vary Light.DS P54 Light Bulb Intensity P54_BULB.SWSEquipment Needed Qty Equipment Needed QtyLight Sensor (CI-6504A) 1 Fluorescent light source (AC) 1Flashlight (or other DC light source) 1 Incandescent light source (AC) 1What Do You Think?The purpose of this activity is to compare the variation in intensity of light from light sources.How does the light from a DC light source compare to light from an AC light source? How doesthe light from a fluorescent tube compare to the light from an incandescent bulb?Take time to answer the ‘What Do You Think?’ question(s) in the Lab Report section.BackgroundElectric light bulbs are powered by a voltage of 60 Hz (or 50 Hz in some countries)sinusoidal wave. The maximum amplitude of the voltage, and thus a maximumbrightness, occurs twice per cycle because an electric bulb is excited when thevoltage increases, regardless of the polarity of the voltage. An electric bulb will havemaximum intensity 120 times per second (or 100 times/second). It will also haveminimum intensity 120 times per second (or 100 times/second).Fluorescent lights blink on and offat a particular frequency. The light intensityfrom incandescent bulbs powered by ACfluctuates as well. The light intensity from anincandescent bulb powered by DC should notvary.SAFETY REMINDERS• Follow directions for using the equipment.For You To DoIn this activity, use the Light Sensor to measure the intensity of light from light bulbs poweredby AC or DC. There are three parts to the activity: Part A = Fluorescent bulb, AC; Part B =Incandescent bulb, AC; and Part C = Incandescent bulb, DC.Use DataStudio or ScienceWorkshop to monitor and display the variations, if any, in the lightintensity. Compare the light intensity of fluorescent and incandescent lights powered by AC, andan incandescent light powered by DC.P32 ©1999 PASCO scientific p. 229
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Phys 1 Student Workbook.pdf

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