https://www.physlab-wiki.com/ 2026-04-18T04:14:49+00:00 https://www.physlab-wiki.com/ https://www.physlab-wiki.com/lib/tpl/UChicago/images/favicon.ico text/html 2024-06-11T12:46:27+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.physlab-wiki.com/phylabs/lab_courses/phys-140-wiki-home/winter-experiments/electrical-measurements-lab/capacitors?rev=1718124387&do=diff Defining capacitance Consider two parallel conducting plates of area $A$ separated by a distance $d$. Such a device is called a capacitor. If we connect each plate to a voltage source like a battery or power supply, a charge will appear on each plate, as shown in Fig. 3.$q$$C$$V$$ q = CV$$(1)$$C = \dfrac{\epsilon_0 A}{d}$$(2)$$\epsilon_0 = 8.85418782\times 10^{-12}\,\,\dfrac{\mathrm{s}^4\mathrm{A}^2}{\mathrm{m}^3 \,\mathrm{kg}}$$(1)$$V = q/C$$V=IR$$\dfrac{q}{C} = IR$$(3)$$q$$I$$I = -\dfrac{dq}{… text/html 2026-01-21T11:41:29+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.physlab-wiki.com/phylabs/lab_courses/phys-140-wiki-home/winter-experiments/electrical-measurements-lab/day2?rev=1769013689&do=diff Experiment Setup Scopes and Function Generators ---------- This lab is designed to introduce you to using an oscilloscope (hereafter referred to as a scope) to display, record and make measurements of time varying signals. In future labs you will be using scopes in a wide range of applications.$0 \text{ V}$$60\text{ Hz}$ text/html 2024-07-18T11:33:25+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.physlab-wiki.com/phylabs/lab_courses/phys-140-wiki-home/winter-experiments/electrical-measurements-lab/marks-analysis?rev=1721316805&do=diff Setting The Gap Height gauge = 5.96mm +/- 0.02mm What limits precision? * Slight amount of play in measurement based on how tight you adjust the mic. Initial mic settings A = 8.18mm +/- 0.03mm B = 10.50mm +/- 0.03mm C = 9.37mm +/- 0.03mm What limits precision? text/html 2026-03-03T14:08:52+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.physlab-wiki.com/phylabs/lab_courses/phys-140-wiki-home/winter-experiments/electrical-measurements-lab/marks-final-notes?rev=1772564932&do=diff Marks Final Notes - Electrical Measurements This is a two part lab that consists of skill building exercises in using meters, scopes, etc. to make DC and AC measurements. General Notes * Emphasize to TA's that they need to emphasize to students the fact that these labs are not experiments, they are skill building exercises. text/html 2025-02-05T14:30:18+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.physlab-wiki.com/phylabs/lab_courses/phys-140-wiki-home/winter-experiments/electrical-measurements-lab/scopes-notes?rev=1738783818&do=diff TA Notes for lab on Scopes and Function Generators Primary Teaching Goals ---------- * Allowing students to gain familiarity with using scopes in the lab without the overarching pressure of having to get the “right” data. * Try to get the students used to the idea that sometimes you learn things by just diving in and figuring them out by trial and error. text/html 2026-03-03T14:43:15+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.physlab-wiki.com/phylabs/lab_courses/phys-140-wiki-home/winter-experiments/electrical-measurements-lab/setup?rev=1772566995&do=diff Setup page for PHYS142 Electrical Measurements lab. Day 1 Each station contains a full set of apparatus for each student so that everyone builds their own circuits. Each station gets. * 1 - Dual 50V power supply. From KPTC-208 * The TA should have a supply of incandescent light bulbs sufficient to give each group one. Note that the light bulbs are in holders that are soldered to wire leads. I use alligator clips to allow these to be connected to banana wires. text/html 2026-02-02T14:02:26+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.physlab-wiki.com/phylabs/lab_courses/phys-140-wiki-home/winter-experiments/electrical-measurements-lab/start?rev=1770058946&do=diff Electrical Measurements - PHYS142 (2025) Introduction ---------- To this point the PHYS141 and PHYS142 labs have focused on how to do experimental physics. Understanding how to make measurements, determine how well something has been measured, drawing appropriate conclusions from data, etc. Each of these labs has been built around doing an experiment. $\text{mA}$$0.1$$0.2\text{ mA}$$0\text{ mA}$$ V = IR $