(Zuzan's notes)
Showing posts with label Resistors. Show all posts
Showing posts with label Resistors. Show all posts
Organize Your Lab Space
Spending some time on preparation pays off later. Karina organized her lab space first so she did not waste time checking all the resistors later. Kudos!
The equivalent resistance of resistors in parallel
Excellent measurements and calculations by Ethan, Natalia, and Roselie. Congrats!
Resistors in series
There are three resistors in series: 1st 330 ohm, 2nd 100 ohm, and 3rd 1,000 ohm.
The first two resistors add to 430 ohm (the reading: 428 ohm, 0.5% difference).
The second and the third one add to 1100 ohm (the reading: 1097 ohm, 0.3% difference).
All three resistors add to 1430 ohm (the reading: 1424 ohm, 0.4% difference).
Resistors combined in series and parallel
Two 10 ohm resistors in parallel are combined with the third 10 ohm resistor is series. The calculated total resistance of the combination is 15 ohm (two 10 ohm resistors in parallel = 5 ohm, plus 10 ohm in series). The measured total resistance is 14.8 ohm and 15.2 ohm; in both cases the measurement error is about 1%.
Resistors in parallel
There are 10 ohm resistors in parallel. The equivalent resistance for two 10 ohm resistors in parallel is 5 ohm. The measured value, as shown in the picture, is 4.98 ohm (percent error of 4%).
The equivalent resistance for three 10 ohm resistors is 3.3 ohm. The measured value (see the photograph) is 3.5 ohm (percent error of 5%).
Resistors in series
There are three 10 ohm resistors connected in series.
The equivalent resistance of two 10 ohm resistors is 10 ohm + 10 ohm = 20 ohm. The first measurement error is 0.5%, while the second one shows the exact expected value.
The equivalent resistance of three ohm resistors is 10 ohm + 10 ohm + 10 ohm = 30 ohm. The measured resistance of these three resistors is 29.8 ohm; the percent error 0.67%
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