(II) While demonstrating Faraday’s law to her class, a physics professor inadvertently moves the gold ring on her finger from a location where a 0.80-T magnetic field points along her finger to a zero-field location in 45 ms. The 1.5-cm-diameter ring has a resistance and mass of 55 μ Ω and 15 g, respectively. ( a ) Estimate the thermal energy produced in the ring due to the flow of induced current. ( b ) Find the temperature rise of the ring, assuming all of the thermal energy produced goes into increasing the ring’s temperature. The specific heat of gold is 129 J/kg·C°.
(II) While demonstrating Faraday’s law to her class, a physics professor inadvertently moves the gold ring on her finger from a location where a 0.80-T magnetic field points along her finger to a zero-field location in 45 ms. The 1.5-cm-diameter ring has a resistance and mass of 55 μ Ω and 15 g, respectively. ( a ) Estimate the thermal energy produced in the ring due to the flow of induced current. ( b ) Find the temperature rise of the ring, assuming all of the thermal energy produced goes into increasing the ring’s temperature. The specific heat of gold is 129 J/kg·C°.
(II) While demonstrating Faraday’s law to her class, a physics professor inadvertently moves the gold ring on her finger from a location where a 0.80-T magnetic field points along her finger to a zero-field location in 45 ms. The 1.5-cm-diameter ring has a resistance and mass of 55 μΩ and 15 g, respectively. (a) Estimate the thermal energy produced in the ring due to the flow of induced current. (b) Find the temperature rise of the ring, assuming all of the thermal energy produced goes into increasing the ring’s temperature. The specific heat of gold is 129 J/kg·C°.
With a piece of wire, whose electrical resistance is 5Ω, a circular loop with an area of 1m2 is made.Then the loop to the plane is in a magnetic field, perpendicular to the loop. Knowingthat the intensity of the magnetic field decreases at the rate of 0.2T per second, we can say that theelectric current flowing through the loop is:
A square conducting loop is in a region of uniform, constant magnetic field. Can the loop be rotated about an axis along one side and no emf be induced in the loop? Discuss, in terms of the orientation of the rotation axis relative to the magnetic-field direction.
A 2.00 - m length of wire is held in an east–west direction andmoves horizontally to the north with a speed of 15.0 m/s. Thevertical component of Earth’s magnetic field in this regionis 40.0 µT directed downward. Calculate the induced emfbetween the ends of the wire and determine which end ispositive.
Chapter 29 Solutions
Physics For Scientists & Engineers, Vols. 1 & 2, And Masteringphysics With E-book Student Access Kit (4th Edition)
University Physics with Modern Physics (14th Edition)
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What is Electromagnetic Induction? | Faraday's Laws and Lenz Law | iKen | iKen Edu | iKen App; Author: Iken Edu;https://www.youtube.com/watch?v=3HyORmBip-w;License: Standard YouTube License, CC-BY