College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- The earth's magnetic field, with a magnetic dipole moment of 8.0 x 1022 A m², is generated by currents within the molten iron of the earth's outer core. Suppose we model the core current as a 3000-km-diameter current loop made from a 1000-km-diameter "wire." The loop diameter is measured from the centers of this very fat wire. ▼ Part B What is the current density J in the current loop? Express your answer to two significant figures and include the appropriate units. J = Submit Part C Лоор Jwire μA Value Submit Request Answer To decide whether this is a large or a small current density, find the ratio of the current density J in the current loop to the current density of a 3.0 A current in a 1.0-mm-diameter wire. Express your answer using two significant figures. 17 ΑΣΦ VO Units Request Answer ? ?arrow_forwardA 10 cm x 10 cm square is bent at a 90° angle. A uniform 5.70x10-2 T magnetic field points downward at a 45° angle.(Figure 1) You may want to review (Pages 843-845). For help with math skills, you may want to review: The Vector Dot Product Figure 45% 5 cm 18 B 1 1 of 1 5 cm 10 cm Part A What is the magnetic flux through the loop? Express your answer with the appropriate units. Value Submit HÅ Provide Feedback Units Request Answer □】?arrow_forwardThe uniform 30.0 mT magnetic field in the figure points in the positive z-direction. An electron enters the region of magnetic field with a speed of 5.50 x 106 m/s and at an angle of 30° above the xy-plane. (Figure 1) Figure X Z 000 30° 12 1 of 1 Part A Find the radius r of the electron's spiral trajectory. Express your answer with the appropriate units. I JA Value Submit Part B DO Request Answer Find the pitch p of the electron's spiral trajectory. Express your answer with the appropriate units. μÅ Value Units Submit Request Answer Return to Assignment Units www ? Provide Feedback ?arrow_forward
- A circular coil of wire 9.00 cm in diameter has 14.0 turns and carries a current of 2.70 A. The coil is in a region where the magnetic field is 0.570 T. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Torque on a circular coil. Part A What orientation of the coil gives the maximum torque on the coil ? Express your answer as an angle in degrees between the field and the normal to the plane of the loop. o= Submit Part B Tmax = What is this maximum torque in part (A) ? Express your answer in newton-meters. Submit Part C ΑΣΦ Request Answer ز Submit ΑΣΦ Request Answer For what orientation of the coil is the magnitude of the torque 71.0 % of the maximum found in part (B)? Express your answer as an angle in degrees between the field and the normal to the plane of the loop. ? - ΑΣΦ Request Answer N m ?arrow_forwardA square portion of a circuit is in a region with an homogeneous magnetic field. The length of the sides is L = 10 cm. The current through the circuit is 1.5 Amp. As a result there is a net force of 0.15 N acting on the wires of circuit. What is the value of the magnetic field? AWhat direetion dees the net feree peint? Te the right Larrow_forwardA small bar magnet experiences a 1.60×10-2 N. m torque when the axis of the magnet is at 45.0° to a 6.00×10-2 T magnetic field. Part A What is the magnitude of its magnetic dipole moment? Express your answer in ampere meteres squared. VGI ΑΣΦ Submit Request Answer 2) ? A.m²arrow_forward
- A 68.0-cm-diameter cyclotron uses a 450 V oscillating potential difference between the dees. Part A What is the maximum kinetic energy of a proton if the magnetic field strength is 0.740 T? Express your answer with the appropriate units. Value Submit Part B μA Submit Units Request Answer IV—| ΑΣΦ 3 How many revolutions does the proton make before leaving the cyclotron? ? Request Answer ?arrow_forwarde. Draw the Amperian loop that will allow you to find the magnetic field at a point P inside the cylinder (r < b). f. Write the integral B ds = $ B cos o ds in terms of the unknown B and the givens 7 and/or b. Your answer should look familiar. g. i. What is the current Ithru going through your Amperian loop? Hint: the current is spread out evenly over the cross-sectional area of the wire so set up a ratio of areas. Check that your expression for Ithrough has the dimensions of current. h. Use (f) and (g) to determine the magnetic field for rarrow_forwardA pair of point charges, q=+8.50 C and g'= -5.50 μC, are moving as shown in the figure (Figure 1) with speads = 9.50-104 m/s and v' = 7.00-10 m/s. The charges are at the locations shown in the figure. Figure 1.300 m 0 0.400 m ▸ Part A What is the magnitude of the magnetic field produced at the origin? Express your answer in teslas. 15] ΑΣΦ ? + √x √x XX IXT 10 B- 1.094 10- Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Part B Part C What is the magnitude of the magnetic force that q' exerts on g? Express your answer in newtons. ΤΕΙ ΑΣΦ ? P= Submit Request Answe Narrow_forwardA proton with a kinetic energy of 4.8x10-16J moves perpendicular to a magnetic field of 0.36 T. Part A What is the radius of its circular path? Express your answer using two significant figures. V ΑΣΦ ? cm Submit Request Answerarrow_forwardPlease solve the question correctly and also be sure to give the correct units. Thank you!arrow_forwardReview I Constants What is the largest possible magnitude of the acceleration of the electron due to the magnetic field? An electron moves at 2.20 x 10° m/s through a region in which there is a magnetic field of unspecified direction and magnitude 7.00 x 10-2 T. Express your answer with the appropriate units. HẢ ? Value Units a = Submit Request Answer Part B What is the smallest possible magnitude of the acceleration of the electron due to the magnetic field? Express your answer with the appropriate units. HẢ Value Units a = Submit Request Answer Part C If the actual acceleration of the electron is one-fourth of the largest magnitude in part A, what is the angle between the electron velocity and the magnetic field? Express your answer in degrees to three significant figures.arrow_forwardarrow_back_iosarrow_forward_ios
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