Given

Data

V = 50

N= 119

Ravg= 0.104375m

r = 1cm 4.5A

r = 1.5cm 3.05A

r = 2cm 2.2A

Data Analysis

B = (4 x 10-7) (4.5) / 2 (1) = 2.83 x 10-6 Tesla (1cm)

B = (4 x 10-7) (3.05) / 2 (1.5) = 1.68 x 10-6 Tesla (1.5cm)

B = (4 x 10-7) ( 2.2) / 2( 2) = 0.69 x 10-6 Tesla (2cm)

Radius of circular path

2/2 = 1cm

1.5/2 = 0.75cm

1/2 = 0.50cm

calculate the charge-to-mass ratio for an electron using the plate potential difference, and the radius of the circular motion, and the magnitude of the magnetic field for each of the three cases. Then, calculate the mean value you found for the charge-to-mass ratio.