A Hall-effect probe operates with a 120 -mA current. When the probe is placed in a uniform magnetic field of magnitude 0.0900 T, it produces a Hall voltage of 0.640 pV. (a) When it is used to measure an unknown magnetic field, the Hall voltage is 0.360 pV. What is the magnitude of the unknown field? mT (b) The thickness of the probe in the direction of B is 1.40 mm. Find the density of the charge carriers, each of which has charge of magnitude e). m-3

A Hall-effect probe operates with a 120 -mA current. When the probe is placed in a uniform magnetic field of magnitude 0.0900 T, it produces a Hall voltage of 0.640 pV. (a) When it is used to measure an unknown magnetic field, the Hall voltage is 0.360 pV. What is the magnitude of the unknown field? mT (b) The thickness of the probe in the direction of B is 1.40 mm. Find the density of the charge carriers, each of which has charge of magnitude e). m-3

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

A Hall-effect probe operates with a 120 -mA current. When the probe is placed in a uniform magnetic field of magnitude 0.0900 T, it produces a Hall voltage of 0.640 pV.
(a) When it is used to measure an unknown magnetic field, the Hall voltage is 0.360 µV. What is the magnitude of the unknown field?
mT
(b) The thickness of the probe in the direction of B is 1.40 mm. Find the density of the charge carriers, each of which has charge of magnitude e).
m-3

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