Physics12 Lab Report 5

Physics12 Lab Report 5 - Physics Lab Report 5 The Electron...

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Physics Lab Report 5 The Electron Charge-To-Mass Ratio Teddy Portney 4/10/07 Lab LK Section A I. Introduction After J.J. Thomson, a British physicist, discovered the electron in 1897, he conducted many experiments over several years. Through these experiments, Thomson showed that, by discharging electrical currents in low-pressure atmospheres, visible electron beams become visible. Thomson also conducted experiments similar to the one we did in this lab, exposing these visible electron beams to different electric and magnetic fields. For this experiment in particular, we know some very useful equations, such as the one relating the charge of an electron, e, to the velocity of the electron. This equation is written as e V = ½ m v 2 . Also useful to know is the equation for the magnitude of the electric field in terms of the current in a coil and the number of turns in the coil. This is written as B = (μ 0 NI / R ) *(8/√125).
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This note was uploaded on 03/27/2008 for the course PHY 12 taught by Professor Gallagher during the Fall '07 term at Tufts.

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Physics12 Lab Report 5 - Physics Lab Report 5 The Electron...

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