Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Chapter 21.2, Problem 2aTH
Draw a vector on the diagram to show the direction of the magnetic field, if any, at point P. Explain your reasoning.
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The 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 A
screen
Find the magnitude of the force exerted by the magnetic field on each side of the triangle.
Express your answer in newtons to three significant figures. Enter your answers numerically separated by commas.
|FrQ|, |FQR|, |FRp| =
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Figure
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• Part B
Part C
What is the net force on the loop?
0.600 m
Express your answer with the appropriate units.
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0.800 m
F =
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Units
The 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?
Here is a bar magnet. The magnetic field made by the bar magnet at one location is shown on the first diagram. Choose from the following directions (shown on second diagram) to answer the following: what is the direction (a – j) of the magnetic field of the bar magnet at location 1 (marked with X)? and what is the direction (a – j) of the magnetic field of the bar magnet at location 2 (marked with X)?
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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- PROBLEM 1. As shown in the figure, a uniform magnetic field B points upward, in the plane of the paper. Then the current is turned on in a long wire perpendicular to the paper. The magnetic field at point 1 is then found to be zero. From this information, draw the magnetic field vector at point 2 when the current is on. Draw the vector starting at the black dot. The location and orientation of the vector will be graded. The length of the vector will not be graded. Explain your reasoning. 2• H Wire 1.arrow_forwardA long straight wire, perpendicular to the page, passes through a uniform magnetic field B = 2.5 T that points to the right, see the picture below. The net field at point 2 is zero. Point 1 is the same distance from the wire as point 2 and point3 is twice as distant. Determine the net magnetic field at point 1. Take the positive direction of the field to the Right. Uniform B-Feld 1 O wire The B-field, B1 = Units Select an answer v 2.arrow_forwardFind the direction of the magnetic field at each of the indicated points. What is the direction of the magnetic field Bc at Point C? O Bc is out of the page. O Bc is into the page. O Bc is neither out of nor into the page and Bc + 0. O Bc = 0. Figure 1 of 2 Part D What is the direction of the magnetic field Bp at Point D? A O Bp is out of the page. O Bp is into the page. O Bp is neither out of nor into the page and BD # 0. O BD = 0arrow_forward
- A long straight wire is located above one edge of a current loop. The wire and loop are oriented perpendicular to the screen/page. The net magnetic field at point 1 is zero. What is the direction of the current in the loop? Draw a vector diagram showing the net magnetic field at point 2. What is the direction of the current loop’s north pole?arrow_forwarda) A proton is moving in a circle under the influence of a uniform magnetic field, B. If an electric field, E is turned on with the direction of E is perpendicular with the direction B, explain the path of the proton will take. Sketch a diagram to aid your answer. b) Figure 1 (a) and (b) show the direction of charge particle move with velocity v in a uniform magnetic field B. Find the direction of the force exerts on the charge particle for (a) and (b) if the charge is, (a) (b) Figure 1 i. Positive. ii. Negative.arrow_forwardTwo wires lie perpendicular to the plane of the paper and equal electric currents pass through the paper in the directions shown. Point P is equidstant from the two wires. a) Construct a vector diagram showing the direction of the resultant magnetic field at point P due to currents in these wires. Explain your reasoning. b) If the currents in both wires were instead directed into the plane of the page (such that the current moved away from us), show the resultant magentic field at point P.arrow_forward
- A current runs through the wire shown at right while the wire passes through a region of constant external magnetic field as indicated in the figure. What is the direction of the magnetic field? If the strength of the magnetic field is B = 0.05 T and the current is I = 3 A, what is the magnitude of the force on 1 meter of this wire in newtons?? F = N ◆ If the current flows right to left through the wire, in what direction will the wire be pushed? ◆arrow_forwardCCW Each diagram shows a rectangular conducting loop, including a small amount of resistance and an ammeter, in the presence of an external magnetic field. The direction clearly indicated, and a notation in the upper right-hand corner of each image indicates how the magnitude of the field is changing with time. Sort the diagrams according to wh in the loop would be clockwise (CW) or counterclockwise (CCW) by dragging each diagram to the appropriately labeled area, or leave it in the central area if neither label applie CW <0 dB O O O O O O dB dt X OF O O O TRO O O O O O X X O. O O X O A O X O O O O O O O X X O O O O O X O O O O X O O OKO O X X X X X O O O O O O O O O X. O O 9 O O O O O O O dB TOO O O O O O O O 100 O O O O O O O O O O O O O O O O` O O O` O. O O O O O O O O O O O O O O O O OSO O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O OZO O O O O O O O OSO O O O O O O O <0 dB dt dB B TRO X A X X X X X X Xarrow_forwardRight hand rule for magnetic field due to a long straight current: Magnetic field lines are a way to graphically represent I the magnetic field. The direction of B at any point is tangent to the field line and the magnitude of B is proportional to the density of field lines. For the long straight wire, the magnetic I field lines form circles around the wire. There is a right hand rule for the direction in the magnetic field go around the wire. Grasp the wire with your thumb in the direction of the current. The direction your fingers wrap around the wire is the direction that the B field lines go around the wire. Check that this agrees with your analysis of the long straight wire from the previous problem. lines В Magnitude of magnetic field due to a long straight current: The magnitude of the magnetic field at a distance r due to a very long straight wire carrying current I can be derived from dB O the Biot-Savart law: HoI ds sin ø HOID ds dB 4π (s2+ D?) 4π(s2+ D2)3/2 D where we used…arrow_forward
- у (ст) 2.0 × 10’ m/s 1- `Proton -x (cm) -1 1arrow_forwardFigure 1 shows two long straight wires. What is the direction and magnitude of the total magnetic field at point P.arrow_forwardPlease refer to Figure 2 included in this folder. For the moment please disregard the moving charge off to the right. The diagram above shows segments of two long straight wires, carrying currents I_1 = 1.50 A and I_2 = 1.69 A respectively. The distance between the wires is 4.47 cm. What is the force on a 1.60-cm segment of wire #2 due to the magnetic field from wire #1?arrow_forward
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