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Note: For this lab, there is both a quantitative and a qualitative answer to the guiding question.
Preparing for the lab:
We will be doing a VARIATION of "Lab 26", which starts on page 259 of the lab manual. The differences are described in a handout.
Read the theory for "Lab 26" (pages 259 and 260 in the lab manual) and then answer the pre-lab questions on LON-CAPA.
There are significant differences between what we will do and what is described in the lab manual procedures. We will only do two cases (see picture below) but will make some additional measurements so we can answer quantitative questions similar to those asked about the omitted case. The procedure handout should be available the week before you do this lab. If not, you will have it at the start of the lab. You will also get a handout containing the data tables for our measurments and pages to use when drawing the equal potential lines and sketching the electric fields.
This picture shows the equipment pretty much as you will use it
when measuring the potentials for the parallel plate capacitor
(the first case we will do). The lab station should look this way
when you arrive AND when you leave, so it is ready for the next group.
This is set so the high (+5 V) potential is on the left and the
low (0 V) potential is on the right, so the E fields will point
downhill to the right. If you find that the location of the ground
contact gets in your way, you can rotate the apparatus by 45 deg or so
to make it easier to work with.
There is a separate page showing a closeup of the power supply so you can see the wiring (red from "+" and black from "com/gnd" and learn the controls we will use on it. It also shows a closeup of the multimeter in DC volts mode. We will use one or both of these instruments for half of the labs this semester, so become familiar with them.
Contact me if you have any questions.