a. The magnitude of the magnetic field at a distance R from a long straight wire is equal to B. At whatdistance will the magnitude of the magnetic field be equal to 3B?b. Two long parallel wires carry equal but opposite currents. Are there any points in space where the totalmagnetic field is equal to zero? If so, where? If not, why not?C.A simple loop circuit contains two sources, a resistive wire, and a switch. It is placed next to a longstraight wire carrying a steady current. As soon as the switch is closed, the loop is suddenly pulledtowards the long wire. Which source has a greater emf? Justify your answer.eHeE2

The magnitude of the magnetic field at distance R from a long straight wire is B.

Answered: a. The magnitude of the magnetic field…

a. The magnitude of the magnetic field at a distance R from a long straight wire is equal to B. At what distance will the magnitude of the magnetic field be equal to 3B?

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter30: Faraday's Law

Section: Chapter Questions

Problem 42AP: Review. In Figure P30.42, a uniform magnetic field decreases at a constant rate dB/dt = K, where K...

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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

a. The magnitude of the magnetic field at a distance R from a long straight wire is equal to B. At what
distance will the magnitude of the magnetic field be equal to 3B?
b. Two long parallel wires carry equal but opposite currents. Are there any points in space where the total
magnetic field is equal to zero? If so, where? If not, why not?
C.
A simple loop circuit contains two sources, a resistive wire, and a switch. It is placed next to a long
straight wire carrying a steady current. As soon as the switch is closed, the loop is suddenly pulled
towards the long wire. Which source has a greater emf? Justify your answer.
eHe
E2

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