LAB REPORT FOR MP10 EXPERIMEN1

LAB REPORT FOR MP10 - North-South direction is because by doing so the Earth’s magnetic field does not cause deflection along y-axis VII-3 The

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LAB REPORT FOR MP10 EXPERIMENT: e/m for electrons, Electric and Magnetic Force VI-1. X=10cm and V ca =3KV To Calculate B and R we use equations and Where N=320 and D=13.6x10 -3 m Y(cm) I U (mA) I D (mA) I AVG (mA) B(Tesla) R(m) 1/R 0.5 40 30 35 0.000148 1.002 0.998 1 80 70 75 0.000317 0.505 1.980 1.5 100 90 75 0.000317 0.340 2.941 2 140 120 130 0.000550 0.260 3.846 2.5 160 150 155 0.000655 0.212 4.716 Now slope S and uncertainty in slope as calculated from graph: S = 0.00013365 and σS = 1.97332E-05 Now e/m exp = 2V CA /S 2 Thus, e/m exp =3.35x10 11 VI-2 Here D=0.05m, V CA =3000v and L=4.5m Y(cm) V P (Volts) E=V P /D (V/m) 0.1 300 6000 0.2 400 8000 0.3 450 9000 0.4 600 12000 0.5 700 14000 0.6 850 17000 0.7 1100 22000 0.8 1450 29000 0.9 1650 33000 1 2000 40000 Slope from Graph : S’ = 2.52883E-05 Calculated Slope: S’= L 2 /4V CA = 1.68E-03 The percent difference between Slope from Graph and Calculated Slope is 6543.388444458505%

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VII-1 VII-2 The deflection of beam along y-axis in section V1 is equal to zero if tube is aligned along
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Unformatted text preview: North-South direction is because by doing so the Earth’s magnetic field does not cause deflection along y-axis. VII-3 The possible reason which results such huge difference between the calculated value of S’ and experimental value of S’ are: 1. The value of L makes the calculated S’ bigger 2. Ideally experimental and calculated never match VII-4 I think NO. As in figure 5 the apparatus is used to diverge the electron beam and mass spectrometer separates particles that have same velocity and same charge, but electrons have same charge, speed and mass. So the apparatus in Figure 5 cannot be used as a mass spectrometer....
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This note was uploaded on 10/20/2011 for the course EE 257 taught by Professor staff during the Spring '11 term at SUNY Buffalo.

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LAB REPORT FOR MP10 - North-South direction is because by doing so the Earth’s magnetic field does not cause deflection along y-axis VII-3 The

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