To conduct such measurements knowledge of the purpose

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charges on an object is categorized as electrostatics and is the main ideology behind this lab. To conduct such measurements, knowledge of the purpose of an electrometer and a Fip is required. Electrometers provide a means for the measurement of both size and sign of a charge through a reading of Volts. It is useful to note that the sign and size of a charge is proportional to its potential size and sign. A Fip, when connected with a grounded electrometer to achieve a 0V initial reading, allows for the determination that charges in conductors can freely move and will do so if they sense an opposite charge without the requirement of physical contact. With such realization, we can measure the charge an object contains with both an electrometer and Fip without touch being required. However, if such an action were to occur, due to the grounding of the electrometer a constant charge should be applied to the Fip; depending upon the sense and magnitude of the disk . Procedure : Part 1; Conduction 1) Rub the disks of different materials together and insert one into the ice pail ensuring no contact is made. Record the result for the measurement while inside, and then outside the pail. Repeat this procedure for the unmeasured disk.
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2) Create friction between the plates and record the measurement of the charge when touched to the Fip and when taken out of the system for both disks. 3) Place both pre-grounded plates into the Fip and create a friction charge while inside ensuring no physical contact to the walls is created, and record the reading. Then take one of the plates out and record its reading, do the same for the following disk. Part 2; Induction 1) With the power supply off connect an aluminum sphere to the 1000V D.C. terminal output of the power supply and the grounded terminal to the ground of the electrometer. 2) Place the similar sphere approximately 1cm away ensuring no physical contact between the two is made. 3) Turn on the power supply to remove the negative charges in the plugged in sphere and replace it with a positive charge. Using the proof plane touch the isolated sphere and measure the charge transferred to the proof plane (don’t ground or touch the pail with the proof plane) 4) Touch the opposing uncharged sphere to ground it. Then with both spheres close but not touching tap the maximum positive charge location with a grounded wire. 5) Turn off the power supply and move the spheres apart, then measure the magnitude and sign of the residual charge on the opposing uncharged sphere.
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