22. * BIO Breathing monitor An apnea monitor for adults consists of a flexible coil that wrapsaround the chest (Figure P21.22). When the patient inhales, the chest expands, as doesthe coil. Earth's B field of 5.0 × 10-5 T passes through the coil at a 53° angle relative to aline perpendicular to the coil. Determine the average induced emf in such a coil duringone inhalation if the 300-turn coil area increases by 42 cm² during 2.0 s.Figure P21.22

From Faraday's law of electromagnetic induction, the magnitude of induced emf is given by

22. * BIO Breathing monitor An apnea monitor for adults consists of a flexible coil that wraps around the chest (Figure P21.22). When the patient inhales, the chest expands, as does the coil. Earth's B field of 5.0 × 10-5 T passes through the coil at a 53º angle relative to a line perpendicular to the coil. Determine the average induced emf in such a coil during one inhalation if the 300-turn coil area increases by 42 cm² during 2.0 s. Tim D01 00

22. * BIO Breathing monitor An apnea monitor for adults consists of a flexible coil that wraps around the chest (Figure P21.22). When the patient inhales, the chest expands, as does the coil. Earth's B field of 5.0 × 10-5 T passes through the coil at a 53º angle relative to a line perpendicular to the coil. Determine the average induced emf in such a coil during one inhalation if the 300-turn coil area increases by 42 cm² during 2.0 s. Tim D01 00

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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1. In the figure of coil and magnet, explain how the meter moves in terms of induced current, as the magnet is pushed into the coil, stopped and then pulled out of the coil in the opposite direction. N.
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ΔΦ. Vndeed=-N At ДФ %3D induced What will increase the Voltage produced by a moving magnet? OIncreasing the area of the loop under a constant B field. Increasing the number of loops in the coil. O Moving the magnet more rapidly O All of the above
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A coil is placed in a uniform constant external magnetic field directed perpendicular to the plane of the coil. Which of the following actions would not induce an emf in the coil? a) Rotating the coil to change the angle ϕ b) Changing the strength of the magnetic field. c) Moving the entire coil in a direction parallel to the direction of the magnetic field d) Reducing the radius of the coil.
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EM Induction Item 4
A solenoid with a diameter of 8.67cm has 92 turns. The solenoid is placed in a uniform magnetic field of 7.39T (perpendicular). *Determine the emf induced in the coil if the strength of the field is reduced to zero in 0.019s.
2. The current in a very long solenoid with radius a and n turns per unit length varies over time as i(t) = Ct². Concentric with the solenoid is a conducting ring of radius r. a) Write an expression for the potential difference induced in the ring. b) Write an expression for the magnitude of the electric field induced at an arbitrary point on the ring. c) Is the ring necessary for the induced electric field to exist? Radius = r Radius i(t) = Ct² -O V = V(t) = a
17. The magnetic flux through three different coils is changing as shown in Figure P21.17. For each situation, draw a corresponding graph showing quantitatively how the induced emf changes with time. FIGURE P21.17 $(T•m²) 0.4 0.2 0 0 2 4 (T • mỏ) 0.4 0 01234 p(T•mỏ) +0.2 A 1 2 3 t(s) -0.2 -t (s)
Question 8