Estimates: since the force it takes to separate one magnet from your refrigerator is nearly the same as the force it takes to separate two magnets stuck together, that force F is 5 N and the area of a refrigerator magnet is 8 cm? Assume that when these magnets are stuck together or to the refrigerator, they are separated by an effective distance d = 25 um. Use the formula derived above to estimate the magnetic field strength of the magnet.

Estimates: since the force it takes to separate one magnet from your refrigerator is nearly the same as the force it takes to separate two magnets stuck together, that force F is 5 N and the area of a refrigerator magnet is 8 cm? Assume that when these magnets are stuck together or to the refrigerator, they are separated by an effective distance d = 25 um. Use the formula derived above to estimate the magnetic field strength of the magnet.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter12: Sources Of Magnetic Fields

Section: Chapter Questions

Problem 67AP: The accompanying figure shows a long, straight wire carrying a current of 10 A. What is the magnetic...

See similar textbooks

Similar questions

What is the magnetic field at point P shown below if a=3.39mm, b = 6.81mm, and the current 1=5,075A? Define positive as out of the page. Assume 3 significant digits and units of Tesla. b Pl —a—
Question 1. Plot a Graph with the data in Table 2, use Magnetic Force as the vertical axis and Current as the horizontal axis. Perform a linear least squares fit on the Graph, record the slope, intercept, and correlation coefficient in the Table 3. [Refer to Appendix 3_ Graphical Analysis of Experiment Results.docx]. Assume the horizontal copper trace on the Magnetic Force Board perfectly perpendicular to magnetic field, determine the magnitude of the magnetic field B, show your calculation in Table 3. Current (A) Table 2 0 0.25 0.5 0.75 1 -0.5 -1 Table 3 Mass of Magnet Assembly (gram) (Measured from scale) 0.000 0.039 0.080 0.122 0.162 -0.094 -0.222 Graph: Measure magnetic force versus Current Slope: Intercept: Correlation coefficient: Calculate magnetic field strength from the slope of your graph: Magnetic Force FB (Newton) 0 0.3822 0.784 1.1956 1.5876 -0.9212 -2.1756
Consider a current-carrying wire (see figure) composed of a quarter-circular arc with radius Rand two straight segments with length L. If the wire carries a current I, and is immersed in a magnetic field with strength B directed into the page, what is the total magnetic force on the entire wire segment? L L R O A. (V2ILB+IRB) j O B. (V2ILB+IRB) (–') Oc. (V2ILB+ V2IRB) ; O D. (V2ILB+ V2IRB) (–j) хх
If the magnetic field at the center of a single loop wire with a radius of 2.4cm is 0.014T, calculate the magnetic field if the radius would be 6.8cm with the same current. Express your result in units of T with 3 decimals.
Determine the direction of the vector v, B , or F that is missing from the pair of vectors shown in each scenario. Here, v is the velocity vector of a moving positive charge, B is a constant and uniform magnetic field, and F is the resulting force on the moving charge. 1. 3. B 5. 6. Answer Bank 2. 4.
For problem 9 of the text, calculate the magnetic field in milliteslas using a value of V2 = 294.1 V (5 sig figs)
Consider the wire, which is in a region of uniform magnetic field of magnitude B=6.2T, carries a current of I=17A as shown in the figure below. If e=34cm, a=51cm and is making an angle of 0=34 degress, determine the net force acting on the wire. Express your answer in units of N using one decimal places. BO y Q.-
Criterion A: Knowing and understanding i. state scientific knowledge. (Max. 2 points) A wire loop is moved from outside the magnetic field until it is fully inside the magnetic field. The initial magnetic flux is 0 Wb, and the change in magnetic flux is 2.5 Wb. The magnetic field has a strength of 0.031 T. Calculate the area of the wire loop. The following equations may be useful: AP = D = BLA Round your answer to 3 significant figures. BA 2.5 Wb A 0.031 T A = m² || ||
Determine the direction of the vector U, B, or F that is missing from the pair of vectors shown in each scenario. Here, u is the velocity vector of a moving positive charge, B is a constant and uniform magnetic field, and F is the resulting force on the moving charge. 1. 4. OB F ta V F O 2. 5. B TE ↑> V F Answer Bank - 3. 6. F OV TE F Į
A hypothetical charge 42pC with mass 66fg has a speed of 59km/s and is ejected southward entering a uniform magnetic field of unknown magnitude and direction. If the path traced is clockwise, 1. Find the magnitude and direction of the magnetic field that will cause the charge to follow a semicircular path (given the diameter 29m). 2. Find the time required for the charge to complete a semi-circular path from point K to point L. 3. Find the magnitude and the direction of the magnetic force at point L.
B INSTRUCTION Solve the following problems. ANSWER ONLY TWO OUT OF THREE QUESTIONS. Show your complete solutions. NOT FOLLOWING OF INSTRUCTIONS will be a deduction of 10 POINTS from the total score. 1.A proton enters a magnetic tield of flux density 1.5 Wb/m² with a vetocity of 2.0 x 107 m/s at an angle of 30° with the field. Compute the force on the proton. 2.A steady current of 2 A in a coil of 400 turns causes a flux of 104 wb to link (pass through) the loops of the coil. Compute the average back emf induced in the coit it the current is stopped in 0.08 seconds. 3. A coil of 50 loops is pulled in 0.020 seconds from between the poles of a magnet, where its area intercepts a flux of 3.1 x 10-4 Wb, to a place where the intercepted flux is 0.10 x 10-4 Wb. Determine the average emf induced.
The force experienced by a test charge q at a point in a region of electric and magnetic fields are given as follows: F1 = 0 for v = Voax F2 = 0 for v = Voay F3 = -[f3]qEoaz for v = vola, + 2a,) Where vọ and Eo are constants. What is the expression for B at that point. O Egaz O (Eo / volaz O Edlax - a,) O (Eo / vol(ax - a,)