Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Textbook Question
Chapter 21.1, Problem 3aTH
To which of your three classes from section I of the tutorial Magnets and magnetic fields could bar 1 belong? Explain your reasoning and the characteristics that define each of you classes.
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The long, thin wire shown in the figure (Figure 1) is in a region
of constant magnetic field B. The wire carries a current of 6.2
A and is oriented at an angle of 7.5° to the direction of the
magnetic field.
Part A
If the magnetic force exerted on this wire per meter is 3.5×10-2 N, what is the magnitude of the magnetic field?
Express your answer using two significant figures.
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B = 40
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Part B
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0 = 3.7
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At what angle will the force exerted on the wire per meter be equal to 1.6×10-² N ?
Express your answer using two significant figures.
197| ΑΣΦΑ
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mT
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The loop of wire shown in (Figure 1) forms a right triangle and carries a current I = 6.00 A in the direction shown. The loop is in a uniform magnetic field that has magnitude B = 3.50 T directed into the screen.What is the magnitude of the net torque on the loop? Calculate the net torque from the torques calculated in part C and also from τ=NIABsinϕ.Express your answer in newton-meters. Enter your answers numerically separated by commas
Two straight wires carrying current are fixed at the locations shown in the figure below. Three field points (labeled A, B, and C) are also indicated in the figure.
Sketch a vector diagram of magnetic fields produced at points A, B, and C in the corresponding boxes below. In each case, sketch the individual magnetic field vectors produced by each current, as well as the net magnetic field. Be sure to label your vectors clearly. (If one of the vectors is zero, explicitly say so.)
Calculate the net magnetic field at point C. Express your answer in vector form.
Chapter 21 Solutions
Tutorials in Introductory Physics
Ch. 21.1 - Based on your experience with electric field...Ch. 21.1 - Carefully draw the magnetic field lines for the...Ch. 21.1 - Based on the magnetic field lines you have drawn,...Ch. 21.1 - Two identical magnets are placed as shown. Using...Ch. 21.1 - To which of your three classes from section I of...Ch. 21.1 - To which of your three classes could bar 2 belong?...Ch. 21.1 - Would end 2A attract, repel, or neither attract...Ch. 21.2 - A magnet is hung by a string and then placed near...Ch. 21.2 - Draw a vector on the diagram to show the direction...Ch. 21.2 - Suppose that a third wire, carrying another...
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- An electron moves with a speed of 5.0×107 m/s in the directions shown in Figure 2 below. A 0.50 T magnetic field points in the positive x-direction. Part A What is the magnitude of the magnetic force in Figure 2)?Express your answer with the appropriate units. Part B What is the direction of the magnetic force in Figure 2?A 45 ∘ to −y and −z B 45 ∘ to +y and +z C −y directionD +z directionarrow_forwardAn electron moves with a speed of 5.0×107 m/s in the directions shown in figure 1 below. A 0.50 T magnetic field points in the positive x-direction. Part A What is the magnitude of the magnetic force in Figure 1)?Express your answer with the appropriate units. Part B What is the direction of the magnetic force in Figure 1)?A 45 ∘ to +y and +z B 45 ∘ to +x and −z C +z directionD −z directionarrow_forwardThe magnetic field in the picture below is uniform and points upward. A wire is normal to the page (going into and out of the paper or computer screen you are looking on). The distance from the wire to point #2 is 1cm. When the wire carries a current, the net magnetic field at point 2 is zero. Point 1 is the same distance from the wire as point 2. Use a vector diagram to determine the net magnetic field at point 1 when the current is on. Point 3 is twice as far from the wire as point 2. Use a vector diagram to determine the net magnetic field at point 3 when the current is on. If the magnetic field at point 3 is 1.0x10-4 T, how much current is flowing in the wire?arrow_forward
- An electron moves along the z-axis with v = 2.9 x 107 m/s. As it passes the origin, what are the strength and direction of the magnetic field at the following (z, y, z) positions? Correct Part B (0 cm. 0 cm, 2 cm) Express your answers using two significant figures. Enter your answers numerically separated by commas. > View Available Hint(s) B2, By, B; = 0,0,0 T Previous Answers Correct Part C (0 cm 2 cm.2 cm) Express your answers using two significant figures. Enter your answers numerically separated by commas. > View Available Hint(s) να ΑΣφ redo B. By, B: = ( -1.16•10¯17 0,0) O You have already submitted this answer. Enter a new answer. No credit lost. Try again. Submit Previous Answersarrow_forwardLearning Goal: To understand the magnetic force on a straight current- carrying wire in a uniform magnetic field. What is the direction of the magnetic force acting on the wire in Part B due to the applied magnetic field? Magnetic fields exert forces on moving charged particles, whether those charges are moving independently or are confined to a current-carrying due north wire. The magnetic force F on an individual moving charged particle depends on its velocity v and charge q. In the case of a current-carrying wire, many charged particles are simultaneously in motion, so the magnetic force denends on the total current I and the lenath of due south due east O due west Figure O straight up O straight down Up Part D W + Now let us assume that we are able to reorientate the wire in (Figure 1) and therefore the direction of current flow. S Down Which of the following situations would result in a magnetic force on the wire that points due north? Check all that apply.arrow_forwardWrite the Biot-Savart law and explain briefly what each term in it represents. Explain also the difference between the magnetic field calculated through the Biot-Savart law and the magnetic field that appears in the magnetic force.arrow_forward
- In the diagram at right, an uncharged conducting bar is moving with constant velocity v to the left through a region where there is a uniform magnetic field pointing out of the page. What charge distribution will the bar have, as a result of its motion? B out of page The bottom of the bar will have positive charge, and the top of the bar will have negative charge. The bar will remain electrically neutral at all points. The top of the bar will have positive charge, and the bottom of the bar will have negative charge. The right side of the bar will have positive charge, and the left side of the bar will have negative charge. The bar will gain a net positive charge, distributed uniformly along its length. The bar will gain a net negative charge, distributed uniformly along its length, The left side of the bar will have positive charge, and the right side of the bar will have negative charge.arrow_forwardThe loop of wire shown in (Figure 1) forms a right triangle and carries a current I = 4.00 A in the direction shown. The loop is in a uniform magnetic field that has magnitude B = 4.00 T directed into the Part D screen. The loop is pivoted about an axis that lies along side PR. Use the forces calculated in part A to calculate the torque on each side of the loop. Express your answer in newton-meters. Enter your answers numerically separated by commas. ? TPR, TPQ, TQR = N.m Submit Request Answer Figure < 1 of 1 Part E What is the magnitude of the net torque on the loop? Calculate the net torque from the torques calculated in part C and also from T = NIAB sin o. Express your answer in newton-meters. Enter your answers numerically separated by commas. 0.600 m ? Tpart C. Trom the Eq.) = N. m -0.800 m Submit Request Answerarrow_forwardI. Use the 1st picture as reference for solving, and 2nd picture for answering. Part 1: Find the magnetic field at z=R from the wire. Part 2: How much current is enclosed at 0<z<R?arrow_forward
- Suppose that the magnetic field at point 1 is B₁ = 24 mT in (Figure 1). Assume that the wires overlap closely at 2 and 3, that each point is the same distance from nearby wires, and that all other wires are too far away to contribute to the field. Figure 1 B₁ 2 1 of 1 3 با Part A What is the magnetic field strength at points 2 to 4 in (Figure 1)? Express your answers using two significant figures separated by commas. 15| ΑΣΦ B2, B3, B4 = Submit Provide Feedback Request Answer C wwww.. ? mTarrow_forwardSECTION A You must answer ALL questions in this Section. 1. Explain (with specific reference to Maxwell's equations) why a traveling wave in the electric field must always be associated with a propagating wave in the magnetic field. 2. Explain why a free charge q will be attracted to the surface of an electrically neutral conductor, and explain how you expect this force to vary with distance compared to the regular Coulomb force between two charges. 3. Explain how you could estimate the refractive index of glass given a power supply, a sheet of glass, two flat pieces of metal, some wire and appropriate instruments for measuring the properties of electrical circuits. 4. With reference to one or more of Maxwell's equations, explain why it is apparently impossible to find a static magnetic field which has a "porcupine" configuration - that is, a surface at which all the field vectors are pointing in the outward direction. 5. Describe the phenomenon of diamagnetism. A grape (which consists…arrow_forwardA finite current-carrying wire lies on the y-axis as shown below. The current has a constant magnitude of I. The wire goes from y =d to y = c . Point P lies on the x-axis at æ = -b.arrow_forward
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