1. Calculate the corresponding magnetic field using the equation for the magnetic field of the Helmholtz Coils:

Data: Table A: V = 300 V

Current I (A)	Radius r (cm)	Magnetic Field B (T)	Charge to Mass ratio e/m (C/kg)
1.40	5
1.48	4.75
1.55	4.5
1.64	4.25
1.73	4
1.85	3.75

Table B: I = 165

Voltage V (V)	Radius r (cm)	Magnetic Field B (T)	Charge to Mass ratio e/m (C/kg)
197	3.25
217	3.5
243	3.75
271	4
302	4.25
366	4.5