Physics II Laboratory
Faculty of Science, Ontario Tech University
Report for Experiment PhyII-03a: 1Magnetic Forces on Wires
Student name: Eghogho Esele CRN: 73018 Date: 2/22/2023
Experiment 1: Force vs. Current
# of Magnets:
6
Current Loop Length:
Current
(A)
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
B=
8.4cm
Mass
(grams)
164.98 g
165.24 g
165.55 g
165.9 g
166.2 g
166.52 g
166.81 g
167.06 g
167.38 g
167.71 g
168.01 g
Mass difference
(grams)
0
0.26 g
0.57 g
0.92 g
1.22 g
1.54 g
1.83 g
2.08 g
2.40+ g
2.73 g
3.03 g
Table 1
Force
(mN)
0
2.56 N
5.59 N
9.02 N
11.96 N
15.01 N
17.93 N
20.39 N
23.52 N
26.75 N
29.70 N
141.89mT
B = (m/1000)/L (converted to mT)
Insert the Force vs. Current graph here.
Report for Experiment PhyII-03a: Magnetic Forces on Wires
Page 1 of 7
Physics II Laboratory
Report for Experiment PhyII-03a: Magnetic Forces on Wires
Faculty of Science, Ontario Tech University
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Physics II Laboratory
Faculty of Science, Ontario Tech University
Experiment 2: Force vs. Current Loop Length
# of Magnets:
6
Current I:
3A
Mass with I = 0:
164.98 g
Length
(cm)
0
1.20
2.20
3.20
4.20
6.40
8.40
B=
Mass
(grams)
164.98 g
165.21 g
165.48 g
165.68 g
166.30 g
166.61 g
166.89 g
Mass difference
(grams)
0.00 g
0.23 g
0.50 g
0.70 g
1.32 g
1.63 g
1.91
Table 2
Force
(mN)
0.00 mN
2.25 mN
4.90 mN
6.86 mN
12.94 mN
15.97 mN
18.72 mN
1.98mT
B = (m/1000)/L (converted to mT)
Insert the Force vs. Conductor Length graph here.
Report for Experiment PhyII-03a: Magnetic Forces on Wires
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Physics II Laboratory
Report for Experiment PhyII-03a: Magnetic Forces on Wires
Faculty of Science, Ontario Tech University
Page 4 of 7
Physics II Laboratory
Faculty of Science, Ontario Tech University
Experiment 3: Force vs. Magnetic Field
Current I:
3A
Current Loop Length:
8.4cm
Magnetic Field
(# of magnets)
1
2
3
4
5
6
Table 3
Mass m0
I=0
(grams)
Mass m
I>0
(grams)
m – m0 (grams)
(mN)
99.70 g
113.00 g
126.10 g
139.00 g
152.00 g
163.61
99.92 g
113.41 g
127.10 g
140.00 g
153.30 g
165.80 g
0.22 g
0.4 g
1g
1g
1.3 g
2.19 g
2.16 mN
3.92 mN
9.8 mN
9.8 mN
12.74 mN
21.46 mN
Mass difference
Force
Insert the Force vs. Magnetic Field graph here.
Final Analysis
Proportionality expression: F = L*I*B
According to the above statement, the magnetic force is proportional to the intensity of the
magnetic field, the amount of current flowing through the conductor, and the length of the
conductor. So, the magnetic force will grow as a result of an increase in any one of these factors,
and so on. This also indicates that each variable exerts an equal amount of impact over the intensity
Report for Experiment PhyII-03a: Magnetic Forces on Wires
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Physics II Laboratory
Faculty of Science, Ontario Tech University
of the magnetic force.
Report for Experiment PhyII-03a: Magnetic Forces on Wires
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Physics II Laboratory
Faculty of Science, Ontario Tech University
Conclusion
The purpose of this experiment was to determine how the magnetic force shifts in response to changes
in either the current (I measured in A), the length (l measured in m), or the number of magnets (B
measured in T).
Attaching a current balance to a big base and positioning a support rod above the Ohaus Cent-o-Gram
balance was the procedure that was followed in order to carry out the experiment. After that, the
magnet holder was placed atop the Ohaus balance, and its weight was subsequently measured. It was
decided to either raise or reduce the current, the length of the current loops, or the number of magnets
in order to achieve the desired change in the force. The value of the mass that was produced by
adjusting one of the variables was used to do the calculation for the force, which was derived based on
that value. It was discovered via the use of this approach that the value of the magnetic force rose in
tandem with the value of the current, the length, or the magnets when it was found that there was a
relationship between magnetic force and current, length, and magnets. In the event that an experiment
was carried out to determine the dependence of magnetic force and an angle between the direction of
the magnetic field and a direction of current, the value of magnetic force would decrease the closer the
angle got to being parallel with the direction of the current. This is because parallel with the direction
of current has a magnitude of zero.
You need the parameters of both the length of the current loop and the slope value of the linear fit in
the current-force graph in order to obtain the mean value of the magnetic field of the magnet bar for
the first experiment. This will allow you to obtain the value of the magnetic field that is typical for the
magnet bar.
You will need the parameters of the magnitude of the current as well as the slope value of the linear fit
in the current loop length-force graph in order to calculate the mean value of the magnetic field of the
magnet bar for the second experiment. This will allow you to determine the average value of the
magnetic field. When the results of the first and second experiments' magnetic fields were compared, it
was discovered that the magnetic field of the first experiment had a value of B=(141), but the magnetic
field of the second experiment had a value of B=. (1.98). This demonstrates that a change in the current
that is flowing through the loop has a higher impact on the magnetic force than a change in the length
of the loop does. The magnetic field was measured in milliTeslas (mT) according to the results of these
studies.
By integrating the proportionality expressions from all three tests into a single expression, the equation
for magnetic force was discovered to be F=(ILB) Kconstant. This equation was derived by combining
the proportionality expressions from the three different studies. Because of this, the vector formula for
the force acting on a conductor that is carrying a current is written as F' = (IL B sin) Kconstant.
Throughout the course of the experiment, it was discovered that the magnitude of the magnetic force
rose in proportion to the current, the length, and the number of magnets that were used.
Report for Experiment PhyII-03a: Magnetic Forces on Wires
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