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# Lab #5 - y max = y x = L = IB vert/T ½ L 2 7 Some...

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Marc Pomi 106040098 3/19/2008 Lab #5 Magnetic Forces Abstract: The purpose of this lab is to use a common wire with a current through it to determine the Earth’s Magnetic Force. Procedure: 1. Move the microscope to the center of the wire and focus the wire image midway on the scale. 2. Slowly turn the current up and read for 10 values the deflection not exceeding 4 amps. 3. Measure the length of the wire and the weight of the mass at the end of the wire. Questions: 1. 2. Cos (90) = 1 for x=L T(x) Cos (90) = To = T(x) = To. 3. The scale is calibrated in millimeters the smallest division however is 2 millimeters. 4. The shunt provides a small resistance the volt meter reads voltage across so we can determine current flow through the wire. 5.

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6. According to the chart the value Bvert equals 0.00014792 along with the equation
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Unformatted text preview: y max = y ( x = L ) = ( IB vert /T ) ½ L 2 . 7. Some discrepancies may include poor judgment of scale through the microscope and vibrations caused by outside forces. Results: Voltage(mV) Deflection (m) Current(A) 4 0.0004 0.4 8 0.0006 0.8 12 0.0008 1.2 16 0.001 1.6 20 0.0012 2 24 0.0014 2.4 28 0.002 2.8 32 0.0024 3.2 36 0.0028 3.6 40 0.0032 4 Conclusion: Using several values found while performing the experiment we were able to determine the effect of earth’s magnetic field. However this procedure is has high error due to large vibration due to physical activity, improper impedance values, and the need for better equipment to read values....
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