Homework for e-m Lab Dimensional analysis is not as easy in problems involving e

Question

Homework for e-m Lab Dimensional analysis is not as easy in problems involving electric and magnetic fields as it was in mechanics, because of all the compound units that appear: for example. A = C/s, V = J/C, T = N/(A m). However, it is still important to check that the units in any equation make sense. Carry out a dimensional analysis of equations (13) and (14), and show that the units of V really do come out to be volts. (Hint: remember that the units of m0 are T m/A.) Suppose that, instead of electrons, we had used a beam of protons in this experiment. How would the apparatus need to be modified to allow us to observe circular motion of the protons? Suppose that we set up our new proton apparatus from part (a) alongside the original electron apparatus, and that we used the same (magnitude) accelerating voltage V and magnetic field B for both. In which case is the path radius R greater? Explain why.

Explanation / Answer

1) incomplete question as eq 13 14 not given

2)r = mv/(qB) , so as mass of proton is greater hence radius needs to be increased and magnetic feild direcion nedds to be reversed or the proton will rotate in opposite direction

3) in case of proton , explained in 2

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