PHY+114+-+Ohm%27s+Rule+worksheet

pdf

School

Arizona State University *

*We aren’t endorsed by this school

Course

MISC

Subject

Electrical Engineering

Date

Apr 3, 2024

Type

pdf

Pages

4

Uploaded by JudgeStraw13915

Report
1 O H M ’ S R U L E & R E S I S T O R S – W O R K S H E E T Name: Partners: TA: DATA & ANALYSIS Resistance ࠵౅࠵? 1 : …………….…………… (unit: _____); ࠵౅࠵? 2 : ……………….…..…… (unit: _____); ࠵౅࠵? 3 : ………………………… (unit: _____) Equivalent Resistance Configuration Calculated Resistance (unit: _______) Measured Resistance (unit: ________) Clean-up/sign-out (3): Data (20) & Graphs (20): Analysis (30): Discussion Q’s (15): Lab Report Total (88): Ryan Mcclellan Kaylee Naveen 46.6 A 20.1 A 10.0 A A A RItR2 R3 46.61 20.1 2 10.0 2 76.5A 76.71 It r 45.6 53.31 1 0 6.681 53.28 2 8.7 a 8.7 2 It's.int n ttoE 0.1712 2 0 12 5.9 1 5.8 1
2 Ohm’s Law or Ohm’s Rule? Signal Generator Voltage (V) DMM Voltage (V) DMM Current (unit: _____) DMM Voltage (V) DMM Current (unit: _____) Carbon Resistor Show your work! Carbon Resistor Lightbulb Slope & units: ______________________ (______) ࠵౅࠵? carbon : ___________________________ (______) (calculated from slope) % difference: ___________________ (between ࠵౅࠵? 1 and ࠵౅࠵? carbon ) MA MA O.lv 0 097 2.22 0.054 20.93 0.20 8.219 4.46 0.116 38.76 0.31 6.54 0.179 49.43 0.40 0.382 8.78 0.272 56.20 0.5 0.479 11.02 0.361 62.3 0.6 0 570 13.09 0 445 67.5 0.7 0.667 15.33 0.532 73.4 0.8 0.764 17.56 0.623 79.1 0.9 0.854 19.64 0.706 84.5 1 0 0.952 21.88 0.796 89.6 1 5 32.77 1.239 113.3 2 0 i 9 3 43.77 1.698 133.0 23 MA V 23 2 0.0435 4mA 0.0435 V MA convert to 79.73.1 rpitpin.ie O 0435 A 1 diff 14 1 1 100 EXPF4 100 79.731
3 DISCUSSION QUESTIONS 1. Explain how you might try to calculate the resistance of the lightbulb using the graph. Would this calculation result in a single value? Why or why not? Explain your reasoning. 2. Why was the voltage measured by the DMM always slightly lower than the Signal Generator voltage? 3. Is the lightbulb an ohmic device? Why or why not? ( Hint: “Because the graph ___________” isn’t a full answer. Think about what causes resistance. What’s different about the bulb’s filament when it’s off vs. on?) By using Ohm's Law R r resistance v voltage across the bulb I current passing through the bulb First find slope then calculate resistance R Ohm's law typically gives a single value but factors such as temperature may make it incorrect Because of factors such as load impedance calibration noise interface and other electrical signals in the environment it is not an ohmic device because resistence will always be changing depending on the applied voltage The resistence will change as temp of the filament changes
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help