29. Sources of Magnetic Field
Ampere's Law (Calculus)
29. Sources of Magnetic Field
Ampere's Law (Calculus)
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- Multiple Choice
A solid, cylindrical conductor carries a uniform current density, J. If the radius of the cylindrical conductor is R, what is the magnetic field at a distance ? from the center of the conductor when r < R? What about when r > R?
722views8rank2comments - Textbook QuestionA solid conductor with radius a is supported by insulating disks on the axis of a conducting tube with inner radius b and outer radius c (Fig. E28.43). The central conductor and tube carry equal currents I in opposite directions. The currents are distributed uniformly over the cross sections of each conductor. Derive an expression for the magnitude of the magnetic field (b) at points outside the tube (r > c).999views1rank
- Textbook QuestionAs a new electrical technician, you are designing a large solenoid to produce a uniform 0.150-T magnetic field near the center of the solenoid. You have enough wire for 4000 circular turns. This solenoid must be 55.0 cm long and 2.80 cm in diameter. What current will you need to produce the necessary field?1294views
- Textbook QuestionA closed curve encircles several conductors. The line integral ∲B .dl around this curve is 3.83 * 10^-4 T m. (b) If you were to integrate around the curve in the opposite direction, what would be the value of the line integral? Explain.548views
- Textbook QuestionThe value of the line integral of →B ⋅ ds around the closed path in FIGURE EX29.21 is 1.38 x 10⁻⁵ T m. What are the direction (into or out of the figure) and magnitude of I₃?695views