Explanation Given Info: The radius of the flat, circular disk is R . The total charge Q is uniformly distributed in the disk. The disk spins at angular velocity ω about an axis passing through its center. To find the expression for magnetic field of disk, use the Biot-Savart’s law. The formula for magnetic field at the center of the disk due to small bit of charge d q carries in a segment of ring I,s d B = μ 0 4 π d q v r 2 (I) Here, v → is the linear velocity along the direction of spin. It is directed tangentially, r is the distance from centre and vector r ^ is the unit vector. As, disk spins at angular velocity ω therefore use the relation between linear velocity and angular velocity in equation (I), The disk spins at angular velocity ω about an axis passing through its center v = ω R Use the expression of v in equation (I), d B = μ 0 4 π d q ω r r 2 = μ 0 4 π ω r d q (II) As total charge of the disk is uniformly distributed in flat circular disk, therefore write charge of small segment of ring in term of surface charge density σ

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Author: Knight

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Magnetic Field Of Coaxial Cable

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Chapter 29, Problem 81EAP

To determine

The magnetic field strength at the center of the disk.

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Chapter 29, Problem 80EAP

Chapter 29, Problem 82EAP

Chapter 29 Solutions

PHYS 212 FOR SCI+ENG W/MAST PHYS >ICP<

Ch. 29 - The lightweight glass sphere in FIGURE Q29.1 hangs...Ch. 29 - The metal sphere in FIGURE Q29.2 hangs by a...Ch. 29 - Prob. 3CQ Ch. 29 - Prob. 4CQ Ch. 29 - What is the current direction in the wire of...Ch. 29 - What is the initial direction of deflection for...Ch. 29 - What is the initial direction of deflection for...Ch. 29 - Determine the magnetic field direction that causes...Ch. 29 - Determine the magnetic field direction that causes...Ch. 29 - Prob. 10CQ

Ch. 29 - The south pole of a bar magnet is brought toward...Ch. 29 - Prob. 12CQ Ch. 29 - Prob. 1EAP Ch. 29 - Prob. 2EAP Ch. 29 - 3. A proton moves along the x-axis with rn/s. As...Ch. 29 - An electron moves along the z-axis with vz=2.0107...Ch. 29 - What is the magnetic field at the position of the...Ch. 29 - What is the magnetic field at the position of the...Ch. 29 - Prob. 7EAP Ch. 29 - Prob. 8EAP Ch. 29 - Prob. 9EAP Ch. 29 - A biophysics experiment uses a very sensitive...Ch. 29 - The magnetic field at the center of a 1.0...Ch. 29 - 12. What are the magnetic fields at points a to c...Ch. 29 - Prob. 13EAP Ch. 29 - What are the magnetic field strength and direction...Ch. 29 - Prob. 15EAP Ch. 29 - 16. The on-axis magnetic field strength cm from...Ch. 29 - A A current circulates around a -mm-diameter...Ch. 29 - 18. A small, square loop carries a A current. The...Ch. 29 - Prob. 19EAP Ch. 29 - 20. What is the line integral of integral points...Ch. 29 - 21. What is the line integral of between points i...Ch. 29 - The value of the line integral of around the...Ch. 29 - 23. The value of the line integral of around the...Ch. 29 - 24. What is the line integral of between points i...Ch. 29 - Prob. 25EAP Ch. 29 - 26. A proton moves in the magnetic field with a...Ch. 29 - Prob. 27EAP Ch. 29 - 28. Radio astronomers detect electromagnetic...Ch. 29 - Prob. 29EAP Ch. 29 - Prob. 30EAP Ch. 29 - The microwaves in a microwave oven are produced in...Ch. 29 - The Hall voltage across a conductor in a 55mT...Ch. 29 - 33. What magnetic field strength and direction...Ch. 29 - 34. The two -cm-long parallel wires in FIGURE...Ch. 29 - The right edge of the circuit in FIGURE EX29.35...Ch. 29 - Prob. 36EAP Ch. 29 - Prob. 37EAP Ch. 29 - 38. A square current loop cm on each side carries...Ch. 29 - Prob. 39EAP Ch. 29 - 40. a. What is the magnitude of the torque on the...Ch. 29 - A long wire carrying a 5.0A current perpendicular...Ch. 29 - Prob. 42EAP Ch. 29 - What are the strength and direction of the...Ch. 29 - At what distance on the axis of a current loop is...Ch. 29 - 45. Find an expression for the magnetic field...Ch. 29 - Prob. 46EAP Ch. 29 - Prob. 47EAP Ch. 29 - 48. A -m-long, -mm-diameter aluminum wire has a...Ch. 29 - Prob. 49EAP Ch. 29 - Prob. 50EAP Ch. 29 - Prob. 51EAP Ch. 29 - Weak magnetic fields can be measured at the...Ch. 29 - The heart produces a weak magnetic field that can...Ch. 29 - Prob. 54EAP Ch. 29 - 55. The toroid of FIGURE P29.55 is a coil of wire...Ch. 29 - 56. The coaxial cable shown in FIGURE P29.56...Ch. 29 - 57. A long, hollow wire has inner radius and...Ch. 29 - 58. A proton moving in a uniform magnetic field...Ch. 29 - 59. An electron travels with speed m/s between...Ch. 29 - Prob. 60EAP Ch. 29 - An antiproton (same properties as a proton except...Ch. 29 - a. A 65 -cm-diameter cyclotron uses a 500 V...Ch. 29 - An antiproton is identical to a proton except it...Ch. 29 - Prob. 64EAP Ch. 29 - Prob. 65EAP Ch. 29 - Particle accelerators, such as the Large Hadron...Ch. 29 - 67. A particle of charge q and mass m moves in the...Ch. 29 - 68. A Hall-effect probe to measure magnetic field...Ch. 29 - Prob. 69EAP Ch. 29 - Prob. 70EAP Ch. 29 - The 10-turn loop of wire shown in FIGURE P29.71...Ch. 29 - The two springs in FIGURE P29.72 each have a...Ch. 29 - Prob. 73EAP Ch. 29 - Prob. 74EAP Ch. 29 - A conducting bar of length I and mass m rests at...Ch. 29 - Prob. 76EAP Ch. 29 - A wire along the x-axis carries current I in the...Ch. 29 - Prob. 78EAP Ch. 29 - Prob. 79EAP Ch. 29 - a. Derive an expression for the magnetic field...Ch. 29 - Prob. 81EAP Ch. 29 - A long, straight conducting wire of radius R has a...Ch. 29 - Prob. 83EAP

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