C- PHYS102 - LAB 3 - eOver-M-Final

6 rb the product of the electron path radius times

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Unformatted text preview: Sec./Group__________ Date:_____________ 5. Data Average Coil Radius R = ________m B = 1.168x10 ­4 I/R e/m = 2ΔV/(r2B2) Table 1. Accelerating Voltage = 200 V Coil Current (A) B-Field (10-3T) Orbit Diameter, d (m) Product rB =dB/2 (Tm x 10-3) 1 2 3 4 Mean value of rB = ___________ Table 2. Accelerating Voltage = ___________ V Coil Current (A) B-Field (10-3T) Orbit Diameter, d (m) Product rB =dB/2 (Tm x 10-3) 1 2 3 4 Mean value of rB = ___________ Table 3. Accelerating Voltage = ___________ V Coil Current (A) B-Field (10-3T) Orbit Diameter, d (m) Product rB =dB/2 (Tm x 10-3) 1 2 3 4 Mean value of rB = ___________ LAB ­03 Motion of Charges in E and B Fields Name:_______________________ Sec./Group__________ Date:_____________ 6.1 Analysis 1. According to eq.(6), rB, the product of the electron path radius times the value of the magnetic field is a constant for a particular setting of the acceleration voltage ΔV. From the average measured value of rB, calculate the value of e/m for each of the three acceleration voltages. For [2] and [3] (in Table 4 below), use other voltages you used in the experiment. Table 4 Accelerating Voltage, ΔV 1 e/m 200 2 3 Use the values of e/m from the three cases above and determine an average value. 2. Calculate the theoretical value of e/m using: e = 1.602 x 1...
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