Help with preliminary questions. 131Experiment 12 Induction – Laboratory ReportSection:DaName:Preliminary Questions:A. What is Faraday's Law?B. How does Lenz's Law relate to Faraday's Law?Data:Part I:

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What is Faraday's Law? How does Lenz's Law relate to Faraday's Law? S.

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter23: Electromagnetic Induction, Ac Circuits, And Electrical Technologies

Section: Chapter Questions

Problem 26PE: Make a drawing similar to Figure 23.14, but with the pendulum moving in the opposite direction. Then...

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Help with preliminary questions.

131
Experiment 12 Induction – Laboratory Report
Section:
Da
Name:
Preliminary Questions:
A. What is Faraday's Law?
B. How does Lenz's Law relate to Faraday's Law?
Data:
Part I:

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Explain how electromagnetic induction can be used to detect metals? This technique is particularly important in detecting buried landmines for disposal, geophysical prospecting and at airports.
What is the value of the magnetic flux through the coil in Figure 23.56 (b) due to the wire?
An induction slave heats a pot with a coil carrying an alternating current located beneath the pot (and without a hot surface). Can me stove surface be a conductor? Why won’t a coil carrying a direct current work?
Why must pan of the circuit be moving relative to other parts, to have usable motional emf? Consider, for example, that the rails in Figure 23.11 are stationary relative to the magnetic field, while the rod moves.
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When a magnet is thrust into a coil as in Figure 23.4(a), what is the direction of the louse exerted by the coil on the magnet? Draw a diagram showing the direction of the current induced in the coil and the magnetic field it produces, to justify your response. How does the magnitude of the force depend on the resistance of the galvanometer?
(a) An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner's 2.00 T field with his fingers pointing in the direction of the field. Find the average emf induced in his wedding ling, given its diameter is 2.20 cm and assuming it takes 0.250 s to move it into the field. (b) Discuss whether this current would significantly change the temperature of the ring.
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Medical devices implanted inside the body are often powered using transcutaneous energy transfer (TET), a type of wireless charging using a pair of closely spaced coils. An emf is generated around a coil inside the body by varying the current through a nearby coil outside the body, producing a changing magnetic flux. Calculate the average induced emf if each 10-turn coil has a radius of 1.50 cm and the current in the external coil varies from its maximum value of 10.0 A to zero in 6.25 106 s. (Hint: Recall from Topic 19 that the magnetic field at the center of the current-carrying external coil is B=N0I2R. Assume this magnetic field is constant and oriented perpendicular to the internal coil.)
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