A circular loop of mass m and radius r is kept in a horizontal position (X-Y plane) on a table as shown in figure. A uniform magnetic field B is applied parallel to x- axis. The current I in the loop, so that its one point iust lifts from the table, is:

A circular loop of mass m and radius r is kept in a horizontal position (X-Y plane) on a table as shown in figure. A uniform magnetic field B is applied parallel to x- axis. The current I in the loop, so that its one point iust lifts from the table, 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 27A

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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 circular loop of mass m and radius r is
kept in a horizontal position (X-Y plane)
on a table as shown in figure. A uniform
magnetic field B is applied parallel to x-
axis. The current I in the loop, so that its
one point just lifts from the table, is:
7/24

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