Physics PSOW: F = BIL
Introduction:
An experiment is set up to determine the flux density from an experiment, where the current, the length of wire and force is calculated to find the flux density.
Independent Variable: Current applied to the circuit (only variable will be changed, so that the experiment can be kept fair).
Dependent Variable: Change in mass, or the decrease in mass as mass never increased but only decreased throughout the experiment.
Controlled Variable: There was only one controlled variable for the experiment, which was the length of the wire used. This was in the path of the magnetic field. The length was kept constant throughout the experiment at 4.92 ± 0.05cm. This was the suitable length needed for this experiment
…show more content…
In this case the graph was plotted with average force (y – axis) against current (x – axis), this was done as length stayed constant throughout the experiment. The gradient of a graph with the axes as so, would give the magnetic flux density multiplied by the length of wire (linear relationship as it is F/I). The calculations turned out to provide a very minute answer for the magnetic flux density, therefore the uncertainties shown on the graph can be seen as significant. But by calculating the gradients of the graph using (y1-y2)/(x1-x2), there was a maximum and minimum gradient due to the uncertainties of mass and current. When averaging the maximum and minimum gradient, the resulting value provides the force divided by current value as per the axes on the graph. Therefore, if this value is divided by the length of the wire, the flux density will be found, which was 1.7212 Tesla. The absolute uncertainty is ±0.2699 T (±15.682 %) because the change in mass and current has an adverse effect on the final …show more content…
As magnetic field lines go from north to south, with magnets (also small curvature around). The metal rod was not able to prevent or absorb all of this. Therefore this would have had an influence in the readings obtained in the ammeter. Once, more this can be associated with a systematic error, even if improvements are made to cover a larger area. There is never a possibility for the metal rod to absorb all the magnetic field lines. This could have affected the final value as all the lines were not cut, as the rod only covered the middle/dense areas. Once again, this will mean that the experiment is not as precise or accurate it could have been. So, this will affect the values obtained for current, and consequently affecting the final value. (Systematic
Anderson and Wood (1925) determined a magnification value equal to 2800 but they neglected the deformation of the tungsten wire under different equilibrium situations. Conversely, the deformation of the wire could be sufficient to reduce the magnification factor of 30%, increasing the moment of inertia. For this reason Uhrhammer and Collins (1990) and Uhrhammer et al. (1996) recomputed the instrument static magnification (GS) that was estimated equal to 2080 ± 60. Using 2800 instead of 2080 in the BB WA simulations leads to a magnitude error of +0.129 (e.g. Uhrhammer et al., 2011).
For this experiment we utilized varying forms of Ohm’s law (V=IR), rules for resistors in series (Rtotal=R1+R2+…) and parallels (1/Rt=1/R1+1/R2+⋯), and Kirchhoff’s Junction Rule (ΣIi=0). For these models we assumed that the DMM’s produced accurate readings
The weekly average was not precise due to the values on Tuesday and Thursday being so much higher proportionally compared to Monday and Wednesday (Graph 1 ). Specific heat was also a value which varied based on the accuracy of the execution of the experiment. Different days lead to different amounts of precision and this was due to the random errors. Random errors were mistakes caused by the experimenter. Tuesday had the lowest standard deviation for all the metals (Table 1).
At first, the magnetic field sensor was plugged into analog A. Next; a magnetic field sensor was open in the Database Studio software by following several instructions. Once the magnetic fields sensor was free, we clicked on the “digits” that was on the lower left side of the screen. Then, the window appeared where it was ready to record the magnetic field. After the computer part was completely set up, we measured the diameter of the Helmholtz coil several times to get the more accurate measurement and recorded the measurement in the data. Later, we set up our device in a way that current flows in the same direction for all the coil.
As the $\chi^2/ndf$ of the fits in Fig.~\ref{fitbr15sysin} are $\approx$ 1, the fit error represents the uncertainty in the distributions. On the other hand, the $\chi^2/ndf$ of the fit functions in Fig.~\ref{fitbr15sysex} are $<<1$, shows that the errors are overestimated. Thus, in these cases, Equation~\ref{Ssdlumsys} is used for error estimation.
In this lab we were trying to figure out if Salt Creek and Barker Lake had the correct chemical balances to sustain catfish for the years coming. In order to find this out, we tested the water using a Hach Water Testing Kit. Inside were dissolved oxygen reagent powder pillows 1, 2 and 3 which we added and mixed into our sample water to prepare it for testing. Then we added droplets of Sodium Thiosulphate Solution into the prepared water too see how much dissolved oxygen parts per million were in the water. Our independent variable in this experiment was the 5 different testing sites that we went to for water samples.
Density Function ( ) ( ) ( ) ∫ ( ) ( ) ( ) ∫ ( ) ( ) { } ∫ ( ) b) Summarize the importance of Gaussian random variable The Gaussian density enters in all areas of science and technology. Accurate description of many practical and significant quantities which are the results of small independent random effects. The importance stems from its accurate description of many practical and significant real-world quantities.
He also noticed that as the coil loops increased so did the voltage as read on a galvanometer. This process of moving the magnet in between the coil wire demonstrated electromagnetic induction. The experiment performed by Erin Bjornsson they talk about how to perform “Faraday’s Experiment” (Bjornsson, 2013) By following similar steps performed by Michael Faraday their hypothesis asked “what will happen when you pass a strong magnet through a loop of copper wire.”
Introduction For two days, on the 14th and 15th of April, a field excursion to Hastings Point, New South Wales was conducted. At Hastings Point, topography, abiotic factors and organism distribution were measured and recorded, with the aim of drawing links between the abiotic factors of two ecosystems (rocky shore and sand dunes), the organisms which live in them, and the adaptations they have developed to cope with these conditions. Within these two ecosystems, multiple zones were identified and recorded, and this report also aims to identify the factors and organisms associated with each zone. Lastly, using data and observations from the past, predictions for the future of the rock pool ecosystem were made.
This was done to get more accurate results. The first time the experiment was conducted it was tested at three different time points, at zero minutes, fifteen minutes and
The author of the journal, Andrew Phelvin, discussed the experiment in depth and where the idea had lacked. Phelvin explains
For example, at the 1st station the ruler was slightly off balanced. This could have affected the results because we could have used inaccurate quantities when determining our answer. Another example would be the clips at the ends of the board in station 5. Since they jutted out slightly at the end it added some length to the board. This most likely affected the angle between the board and string.
Errors that could have caused this could be incorrectly using the fiber optic tool to measure the light being emitted. Having the measuring device too close or too far away from the light, or perhaps holding it at an incorrect angle so it picked up an excessive amount of light from the environment. Another possible, but improbable, error could be that our spectrometer or our fiber optic could have been malfunctioning causing all the data to be
Methods of Data Collection Measuring the independent variable: The pH (the independent variable) is being tested on the turnip peroxidase to observe the reaction rates. 5 levels of pH are required for these series of reactions so pH buffers of 3, 5, 7, 9, and 11 are to be placed in each of the waters that will be put into the cuvettes for the experiment. Measuring the dependent variable: A colorimeter must be used in order to calculate the reaction rate/absorbance level of the turnip peroxidase when the different pH levels affect it. The colorimeter can be used to measure the transfer of heat to or from an object.
The time it took for each of the trials was a recorded and then based on that along with the radii measurements the calculations for the centripetal force were conducted. The purpose of this experiment was to measure the period of a swinging stopper for three selected radii in order to calculate the centripetal