3. A wire is moving on frictionless rails in a uniform magnetic field, as shown to the right. The wire is part of a complete circuit with a resistance R. a. If the magnetic field is 0.05 T and the wire is 5 cm long, what speed is necessary to produce an emf of 2 mV across the ends of the wire? b. If the resistance is 20 2, what is the current in the circuit? O O oto O*O

3. A wire is moving on frictionless rails in a uniform magnetic field, as shown to the right. The wire is part of a complete circuit with a resistance R. a. If the magnetic field is 0.05 T and the wire is 5 cm long, what speed is necessary to produce an emf of 2 mV across the ends of the wire? b. If the resistance is 20 2, what is the current in the circuit? O O oto O*O

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter25: Electromagnetic Induction

Section: Chapter Questions

Problem 87A

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