# Voltage and Resistance of Devices in An Electric Circuit Lab Report

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Testable Question: How does current depend on the voltage and resistance of devices in an electric circuit? Use this Phet to change the variables to determine the effects of voltage and resistance in BOTH a series and a parallel circuit.Phet – Circuit Construction Virtual LabExperiment 1: How does current depend on increasing voltage in a series circuit (begin with 1.5 V)? Experiment 2: How does current depend on increasing resistance in a series circuit?Experiment 3: How does current depend on increasing voltage in a parallel circuit (begin with 1.5 V)? Experiment 4: How does current depend on increasing resistance in a parallel circuit?Create a lab report and script I can use for a video presentation. Please submit by Monday if possible.

Lab Report Format for SPH3U
slides. Remember to save your slides in PDF format before you submit them
to the dropbox.
Title page
● Title (specific and is related to the testable question and actual
experiment)
● Date
● Author
● Team (if applicable)
Introduction
Prior knowledge – background information required as knowledge & cited as per APA
requirements
Images to support background information & cited as per APA requirements
Testable Question – this has been provided to you for each lab. Copy directly from the lab
Properly formatted table of quantities affecting your study
Hypothesis (properly formatted with all parts – If…..then…..because….)
Purpose (written in past tense)
Sample of quick introduction (change me)
As you can see in figure 1, the forces affecting the motion are weight and air resistance.
Based on quick observation was noticed that coffee filter moves at constant speed
almost immediately.
Forces include gravity, friction, and applied force. Force causes changes in the
speed or direction of motion. There are four main types of contact forces.(World
Atlas, 2022) The first one, the normal force is when nothing is happening. A book may
be sitting on a table and gravity is pulling it to the ground, but there is the table
underneath it, preventing that from happening. Applied force, is the force that is
applied to move that same book from one position to another. Tension is when two
pulling forces, directly opposite of each other stretch an object (World Atlas, 2022).
Imagine you and your sibling pulling on the book, fighting over it, stretching its covers
and pages until it pulls apart. The final type of contact force is called spring force, and
this is the force that is created by a compressed, stretched spring on any object that is
directly attached to it (World Atlas, 2022).
All motion depends on an object changing position over a period of time. There are
numerous quantities that can affect the motion of an object in this lab.
Ball in
projectile
motion
Horizontal
ramp
Fig. 1 Data was collected using video tracker
and a video with 240 fps.
Meter stick
for
calibrating
video
Table of quantities
Table 1. Quantities affecting or being affected by the vertical falling motion of the coffee filter through air
Quantity
Variable
Unit
Type
Position vertical
y
m
dependent
Position horizontal
x
m
controlled
Time
t
s
independent
shape
D
No units
controlled
mass
m
kg
Controlled
Air density
ρ
Kg/m3
Controlled
Testable Question & Hypothesis
Testable question: How does position depend on time for a coffee filter with constant mass and
shape falling through air near earth’s surface?
Hypothesis: The coffee filter will reach terminal velocity almost immediately since it has a very small mass
and an aerodynamic shape that will be increase the drag force at the very instant it moves. Therefore, the
vertical position of the coffee filter falling through air will increase linearly proportional with time. The position
time graph will yield a linear relationship.
Procedure
Point or paragraph format
Third person
Past tense
Refer to diagrams for crucial steps and setup
Apparatus setup
How quantities are controlled
How is independent quantity changed and measured
How is dependent quantity measured
No other steps are added to the procedure
Table of observation
Table 1 Position of a ball in projectile motion collected using video tracker at 120 fps
Time t (s)
Range x (m)
Vertical position y (m)
0.83
-3.24
1.80
0.87
-3.35
1.71

0.90
-3.42
1.62
0.93
-3.53
1.52
0.97
-3.68
1.41
1.00
-3.80
1.28
1.03
-3.93
1.14
1.07
-4.03
0.98
1.10
-4.15
0.82
1.13
-4.21
0.65
1.17
-4.33
0.47
1.20
-4.45
0.27
Data shows a nonlinear relationship
variable, unit
Table is
indexed
Proper number of
significant digits
Caption
Title
Graphs
Descriptive title
Error bars
Labelled axis
Fig 2. The experimental data produced the following
equation matching the pattern: y = -5.2t2 + 6.3t + 0.1
Caption
Analysis

Paragraph format

Explanation of results

Sample calculation

All calculations in table form

Percent error calculations (if appropriate)
Conclusions

Restate hypothesis

Conclude whether you were able to verify or not your hypothesis

Base your conclusions on the tables, diagrams, videos, graphs, analysis

Classify errors (in a properly formatted table)

Include further studies based on the same setup
Error calculations
Error analysis
Table 3 – Possible errors that can occur in this experiment
Description
Type of error
Solution/Reduction of Effect
Tracking the same point on the ball
Random
This error is due to the irregular shape of the ball and its size.
Possible solutions:
Repeat measurements to increase number of trials
Track a point at the lowest edge to be consistent
Zoom in to be able to get the same point over each measurement
The image of the 3.0 m marker is not
sharp. It is used to calibrate the
whole scene
Systematic
Zoom in to account for the gap between edges and the posts.
Sample of a conclusion
In projectile motion, the hypothesis stated that the motion of the object in the horizontal direction is constant velocity motion
and in the y direction it is acceleration motion because in the horizontal direction there is no force acting on the
object, whereas in the y direction there is a gravitational force acting on it. Therefore, in the x direction we don’t
have acceleration and in the y direction we have acceleration.
According to the data (table 1) and the graph (figure 2) that was obtained, we have a linear relationship (x=4.556t+0.492) between the x
position and time, which indicated that we have a constant velocity motion in the x direction. Whereas, for the
second graph, we got a second order relationship (y=-5.0537t^2 + 5.7317t + 2.5043) which indicated that the motion
in the vertical direction is acceleration motion. The results are consistent with our hypothesis.
The acceleration we got from this experiment is a=10.1 m/s^2 meaning it is greater than what we expected. The errors
made are equivalent to 3%. The results that we obtained verified our hypothesis.
A study of the positions (horizontal and vertical) of a basketball could be performed similar to a canon. In both
apparatuses, the horizontal position has a constant velocity and the vertical component is affected by gravity.
References
● All references listed in alphabetical order by author’s last name (if
available)
● All references include date of copyright and/or date of retrieval
● All references properly formatted as per APA requirements
Please note that any submissions without references will be assigned a zero
Last step
Download the completed report as PDF and submit it in the appropriate
assignment folder