How do I do this and what equations should I use? **Examples****Q.** A straight, horizontal stretch of copper wire has a current \(i = 28 \, \text{A}\) through it. What are the magnitude and direction of the minimum magnetic field needed to suspend the wire, i.e., to balance its weight? Its linear density is \(46.6 \, \text{g/m}\).**Ans.** \(1.6 \times 10^{-2} \, \text{T}\)**Diagram Explanation:**- The diagram shows a wire with three forces acting on it: - \(F_B\) (magnetic force) is directed upwards. - \(mg\) (gravitational force or weight of the wire) is directed downwards. - \(B\) (magnetic field) is directed horizontally to the right.The perpendicular arrangement of the magnetic field and the current in the wire results in the magnetic force (\(F_B\)) that acts upwards to balance the gravitational force, allowing the wire to be suspended.

Answered: Image /qna-images/answer/ca15bd0b-8bf3-4393-89fb-10fea7c6a340.jpg

Q. A straight, horizontal stretch of copper wire has a current i= 28 A through it. What are the magnitude and direction of the minimum magnetic field needed to suspend the wire, i. e. to balance its weight? Its linear density is 46.6 g/m. Ans. 1.6 x 10-2 T FB mg

Q. A straight, horizontal stretch of copper wire has a current i= 28 A through it. What are the magnitude and direction of the minimum magnetic field needed to suspend the wire, i. e. to balance its weight? Its linear density is 46.6 g/m. Ans. 1.6 x 10-2 T FB mg

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.

Question

How do I do this and what equations should I use?

**Examples**

**Q.** A straight, horizontal stretch of copper wire has a current \(i = 28 \, \text{A}\) through it. What are the magnitude and direction of the minimum magnetic field needed to suspend the wire, i.e., to balance its weight? Its linear density is \(46.6 \, \text{g/m}\).

**Ans.** \(1.6 \times 10^{-2} \, \text{T}\)

**Diagram Explanation:**

- The diagram shows a wire with three forces acting on it:
- \(F_B\) (magnetic force) is directed upwards.
- \(mg\) (gravitational force or weight of the wire) is directed downwards.
- \(B\) (magnetic field) is directed horizontally to the right.

The perpendicular arrangement of the magnetic field and the current in the wire results in the magnetic force (\(F_B\)) that acts upwards to balance the gravitational force, allowing the wire to be suspended.

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