Why does a loop contract in area to minimize flux linkage?

Thread starter arkofnoah
Start date Aug 15, 2010
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Electromagnetic Electromagnetic induction Induction

AI Thread Summary

A loop contracts in area to minimize flux linkage due to the principles of electromagnetic induction. When the area of the loop decreases, the magnetic flux through the loop also decreases, which reduces the induced electromotive force (EMF) according to Faraday's law. This contraction occurs despite the magnetic force acting radially outward, as the system seeks to minimize energy. The discussion highlights the confusion between the magnetic force direction and the behavior of the loop in response to changing magnetic fields. Understanding this relationship is crucial for grasping the dynamics of electromagnetic systems.

Aug 15, 2010

arkofnoah

Homework Statement

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Homework Equations

The Attempt at a Solution

The answer says that the loop will reduce in area to minimize the flux linkage, but why? using Fleming's left hand rule the magnetic force should direct radially away from the centre so why should there be any contraction in area?

Last edited by a moderator: May 4, 2017

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Aug 16, 2010

arkofnoah

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