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Question: In electrolysis 96 500C of charge releases 1 mole of hydrogen atoms.

a. From this information show how to determine the charge-to-mass ratio of the proton. Clearly state any assumptions you make.

b. Suppose in measuring e/m of the electron you observed that electrons accelerated through a voltage acquire velocity of v = 0.03 c (where c is the speed of light in vacuum) and bend in the circle of radius r = 3cm in a magnetic field of B = 2mT. What would you determine e/m to be? (Your answer should be different from the accepted value.)

c. Explain why results like your answers to (a) and (b) implied to J.J. Thomson the existence of a new particle. What was it, and in what ways is it important?

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