A thin semicircular conducting ring (PQR) of radius * is falling with its plane vertical in a horizontal magnetic tield B, as shown in figure. The potential difference developed across the ring when its speed is v, is:

A thin semicircular conducting ring (PQR) of radius * is falling with its plane vertical in a horizontal magnetic tield B, as shown in figure. The potential difference developed across the ring when its speed is v, is:

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 48A

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Concept explainers

Ferromagnetism

Ferromagnetism is a mechanism by which some materials show magnetic properties. Iron and magnetite, an oxide of iron, are two naturally occurring materials that show the property of ferromagnetism. The word ferromagnetism is derived from the Latin name of iron, "Ferrum" as it was the first observed material to show such property. The property of ferromagnetism is shown by only a few substances such as iron, nickel, cobalt, and their alloys. Some transition metals and alloys of rare-earth metals also show ferromagnetism.

Question

A thin semicircular conducting ring (PQR) of radius
* is falling with its plane vertical in a horizontal
magnetic field B, as shown in figure. The potential
difference developed across the ring when its speed
is v, is:
(1)
Zero
(2)
Bver/2 and Pis at higher potential
Bv and Ris athigher potential
(4)
2rBv and Ris at higher potential

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