The figure below shows a flexible loop of metal wire with a radius of 10.0 cm. It lies in a magnetic field pointing into the page with a magnitude of 0.130 T. An engineer grabs the loop at points A and B and rapidly pulls in opposite directions until the loop folds up, such that its area becomes zero. The change in area occurs in a span of 0.250 s. A B What is the average induced emf (in mV) in the loop over this time span? 16 What is the initial magnetic flux through the loop? If the loop's area goes to zero, what is the final flux? How is the change in flux and change in time related to the induced emf? Be careful with unit conversions. mV

The figure below shows a flexible loop of metal wire with a radius of 10.0 cm. It lies in a magnetic field pointing into the page with a magnitude of 0.130 T. An engineer grabs the loop at points A and B and rapidly pulls in opposite directions until the loop folds up, such that its area becomes zero. The change in area occurs in a span of 0.250 s. A B What is the average induced emf (in mV) in the loop over this time span? 16 What is the initial magnetic flux through the loop? If the loop's area goes to zero, what is the final flux? How is the change in flux and change in time related to the induced emf? Be careful with unit conversions. mV

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 4OQ: A circular loop of wire with a radius of 4.0 cm is in a uniform magnetic field of magnitude 0.060 T....

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Design a current loop that, when rotated in a uniform magnetic field of strength 0.10 T, will produce an emf =0 sin t. where 0=110V and 0=110V .
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A circular loop of wire with a radius of 4.0 cm is in a uniform magnetic field of magnitude 0.060 T. The plane of the loop is perpendicular to the direction of the magnetic field. In a time interval of 0.50 s, the magnetic field changes to the opposite direction with a magnitude of 0.040 T. What is the magnitude of the average emf induced in the loop? (a) 0.20 V (b) 0.025 V (c) 5.0 mV (d) 1.0 mV (e) 0.20 mV
Review. Figure P31.31 shows a bar of mass m = 0.200 kg that can slide without friction on a pair of rails separated by a distance = 1.20 m and located on an inclined plane that makes an angle = 25.0 with respect to the ground. The resistance of the resistor is R = 1.00 and a uniform magnetic field of magnitude B = 0.500 T is directed downward, perpendicular to the ground, over the entire region through which the bar moves. With what constant speed v does the bar slide along the rails?