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d. The B that you calculated in part c above is in the form of B = kl where k is a constant that depends on characteristics of the Helmholtz coils (number of turns N, and radius of coil a). If μo = 4 x 107 T.m/A, N=140, and a =0.14 m, calculate k. What is its unit?
k=8.9918 * 10-4T/A
q/m = V rB [Equation 4]
V₁ = f -2qAV-mv-2qV. m [Equation 5]
Suppose a current of two amperes runs through your Helmholtz coil. Calculate the magnitude of the magnetic field that is created: Our goal in this lab is to measure the charge-to-mass ratio of an electron. Equation 4, which you derived above, provides q/m in terms of v, B, and r. Equation 5, which you derived above, provides v in terms of m,q, and AV2. Use these two equations to find another equation for g/m in terms of r, B, and AV2: [Equation 7]