Faraday's law
pdf
keyboard_arrow_up
School
Arizona State University *
*We aren’t endorsed by this school
Course
114
Subject
Law
Date
Feb 20, 2024
Type
Pages
10
Uploaded by CaptainRedPandaMaster1014
Faraday’s Law Ulani Rizo PHY 114 N
ovember 24, 2023 1
Objective: (3 points) To examine Experimentally the basic principles governing electromagnetic induction; To compare measured magnetic field of the solenoid with the calculated value; To verify Faraday’s Law of induction by measuring the emf generated in small pickup coil and comparing it with the calculated value; To investigate the factors that influence the magnitude emf. Experimental Data (3 points): Provide and label screenshots for parts 1a), 1b), 2a) and 2b) as well as your graph for part
3a. 2
Part 1 a
3
Part 1B PART 2 A
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
4
PART 2B
PART 3V GRAPH
Table 1: (Using constant current) Table 2: (Using triangle wave) Table 3: Current (units)
B (units)
39v
7.80
Current (units)
V
emf
(units)
t
1
= 4.5s
-7.75
4.126
t
2
= 3.9s
7.16A
4.06
Frequency (units)
V
emf
(units)
0.797
4.06
1.587
8.13
9.524
12.19
126.98
16.26
5
Data Analysis (10 points): Be sure to include equations! 6
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
Part 1:
Calculate the theoretical magnetic field at the center of the solenoid 0.0328648 tesla Calculate the percent error between the theoretical and experimental values for the magnetic field at the center of the solenoid. 0.013% error 7
Part 2: Calculate the magnetic field of the solenoid at each instant t
1
and t
2
. Calculate the theoretical emf occurring between t
1
and t
2
. Vemf= 4.126 theoretical Vemf= 4.06 experimental Calculate the percentage error between the theoretical and measured values for the emf. -1.59% error Part 3: Show your calculations for finding the frequency, f1 and its corresponding period, T1. Period = 1.255s. F1= .797hz Repeat calculations for frequencies f2, f3 and f4 and their corresponding periods. F2= 1.587 period= 0.63s F3= 9.524 hz period = 0.42s F4= 126.98 hz period 0.315s Results (3 points) Table 5 (part 1): Theoretical
Experimental
% error
Magnetic field (units)
0.0328648
0.032429
0.013%
8
Table 6 (part 2): The highest V
emf
which can be produced on this apparatus has a value of 16.8 and uses f = f4 and N
coil
= 570. Post Lab Questions (5 points): 1.
In part 1a) do the calculated and the measured magnetic fields of the solenoid agree? They do not one hundred percent agree but a just slightly of from each other by .013 % 2.
In part 1b) do the V vs. t and B vs. t graphs look similar? Yes they look similar in the sense that both graphs are in phase with each other. 3.
In part 2a) what happens when the Vemf is measured using a constant current (DC power supply)? Explain. The voltage included in the coil due to its self-inductance cancels out the externally applied voltage across the coil which is also known as the back emf of the coil. 4.
Did the experiment verify Faraday’s law of induction? It did, except for the last part, however I may have done it wrong. Theoretical
Experimental
% error
V
emf
(units)
4.136
4.06
-1.59%
9
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
Discussion and Conclusion (5 points): In summary, the Faraday's Law lab experiment confirmed the direct proportionality between induced electromotive force (EMF) and the rate of change of magnetic flux. Results aligned with theoretical expectations, demonstrating the reliability of Faraday's Law. Factors such as the number of coil turns and magnetic field strength were identified as influential variables. The experiment not only validated the law but also emphasized its significance in various technological applications, showcasing its role in power generation and electric motors. Overall, the findings contribute to a deeper understanding of Faraday's Law and its practical implications. 10