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MP10 - MP10 e/m for electrons Electric and Magnetic forces...

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MP10: e/m for electrons, Electric and Magnetic forces VI-1. Tabulate the data of section VI. Add columns for I, B, R and 1/R. Plot B vs 1/R/ Determine the slope S and the error σs using a least squares fit. Use eq. 6 to determine e/m. Compare your experimental value for e/m with the calculated value and give the percentage error. x= 10cm N= 320 D= 0.136 m V CA = 3000 V Y(cm) I_U(A) I_D(A) I_AVG(A) B(T) R(m) 1/R(m) 0.5 5.10E+01 4.50E+01 4.80E-02 0.000203108 1 1 1 1.01E-01 9.00E-02 8.05E-02 0.000340629 0.51 1.9607843 1.5 1.50E-01 1.35E-01 1.43E-01 0.000602977 0.34 2.9411765 2 2.00E-01 1.80E-01 1.90E-01 0.000803969 0.26 3.8461538 2.5 2.40E-01 2.20E-01 2.30E-01 0.000973226 0.21 4.7619048 Slope 0.0002130 -3.322E-05 y-intercept Uncertainty in Slope 1.052E-05 3.3591E-05 Uncertainty in y-intercept S = (0.0002130 ± 0.0001) X 10 -5 T/m -1 = em 2VCAS2 = × ( . ) em 2 3000 0 0002130 2 = . / em 1 322E11 C kg = . - e 1 602176462E 31 kg , = . - m 9 109E 31 kg = . - . - em 1 602E 199 109E 31 = . em 1 759E11 Ckg Percentage Error: = / ) -( / ) / × e m cal e m expe mcal 100 = . - . . × 1 758E11 1 322E111 322E11 100 = . % 24 8 VI-1. Tabulate the data of section V2. Add a column for the electric field E=Vp / d(d=5cm). Plot y versus E. Determine the slope S’ using a least squares fit. Calculate S’ using eq.18. Determine the percentage difference between the experimental and

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