152-ES1 Intro rev 3

152-ES1 Intro rev 3 - Quiz on EC0 Quiz on EC0 Turn on your...

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uiz on EC0 Quiz on EC0 urn on your clickers to connect to this session Turn on your clickers to connect to this session You may reference your lab report/lab manual/notes when answering these questions You will have 30 seconds for each question o talking no writing Either will be seen as No talking, no writing. Either will be seen as cheating, and you will receive a 0 for this quiz. You will only have 2 tries to answer each question
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152-ES1: Electrostatics As you learned in lecture, electrostatics is the study of static charge distributions. In order to study a thing, it must be possible to measure it, and it is very difficult to measure charge directly. Capacitor: A device that stores charge, and the amount of charge is related to the potential difference between the onductors as given by: q CV C: Capacitance-For a given set of materials (conductors and conductors as given by: dielectrics) depends only on the arrangement of the materials. If we have the ability to sample the charges in a distribution and then put those charges on a capacitor, we can then measure the voltage. From that voltage, we can deduce the charge. (page 1) 1) How to sample charge? 2) Where to put charge sample for measurement?
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Charge Sampling + + + + + + + 1000 V + he proof plane is an Al disc on a non onducting handle The proof plane is an Al disc on a non-conducting handle. If you touch it to a charged object, it will pick up an amount of charge proportional to the amount of charge on the object around the point of contact, allowing you to move those charges to our capacitor. This solves our sampling problem. (page 2)
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electrometer Proof lane Charge Measuring - + + pail shield plane The capacitor we use is known as a Faraday Pail. It consists of an inner ylinder (the pail) and an outer cylinder + - + + + - - - - - - + + ground cylinder (the pail) and an outer cylinder (the shield). The tops of the cylinders are open, allowing us to manually eposit charges as required.
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This note was uploaded on 11/09/2010 for the course PHY 35345 taught by Professor Aa during the Spring '10 term at SUNY Buffalo.

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152-ES1 Intro rev 3 - Quiz on EC0 Quiz on EC0 Turn on your...

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