In a model AC generator, a 495 turn rectangular coil 8.0 cm by 22 cm rotates at 120 rev/min in a uniform magnetic field of 0.55 T. (a) What is the maximum emf induced in the coil? (b) What is the instantaneous value of the emf in the coil at t = (π/32) s? Assume that the emf is zero at t = 0. (c) What is the smallest value of t for which the emf will have its maximum value? S

In a model AC generator, a 495 turn rectangular coil 8.0 cm by 22 cm rotates at 120 rev/min in a uniform magnetic field of 0.55 T. (a) What is the maximum emf induced in the coil? (b) What is the instantaneous value of the emf in the coil at t = (π/32) s? Assume that the emf is zero at t = 0. (c) What is the smallest value of t for which the emf will have its maximum value? S

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter23: Faraday’s Law And Inductance

Section: Chapter Questions

Problem 1OQ

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A 50-turn coil has a diameter of 15 cm. The coil is placed in a spatially uniform magnetic field of magnitude 0.50 T so that the face of the coil and the magnetic field are perpendicular. Find the magnitude of the emf induced in the coil if the magnetic field is reduced to zero uniformly in (a) 0.10 s, (b) 1.0 s, and (c) 60 s.
To monitor the breathing of a hospital patient, a thin belt is girded around the patients chest as in Figure P20.21. The belt is a 200-turn coil. When the patient inhales, the area encircled by the coil increases by 39.0 cm2. The magnitude of Earths magnetic field is 50.0 T and makes an angle of 28.0 with the plane of the coil. Assuming a patient takes 1.80 s to inhale, find the magnitude of the average induced emf in the coil during that time. Figure P20.21
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