Experiment: EMF from Moving Wires in a Magnetic Field

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    Emf Experiment
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Discussion Overview

The discussion revolves around the experiment involving electromagnetic force (EMF) generated by moving wires within a magnetic field. Participants explore the implications of wire movement on current flow in a circuit formed by the wires, considering both theoretical and conceptual aspects.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant asserts that there will be a current flowing through the circuit formed by the four wires due to the EMF generated in opposite directions.
  • Another participant proposes an alternative perspective, suggesting that the area of the circuit is shrinking, which leads to a decrease in magnetic flux linking the circuit.

Areas of Agreement / Disagreement

Participants present differing viewpoints on the nature of the EMF and its effects on current flow, indicating that the discussion remains unresolved with multiple competing interpretations.

Contextual Notes

There are potential limitations regarding the assumptions about the magnetic field's uniformity and the specific conditions under which the wires are moving, which have not been fully explored.

alva
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The attached drawing represents 4 wires. The top and down are still. The right and left move with the same velocity v as shown by the arrows.

There is a magnetic field perpendicular to the page.

Will there be a current flowing through the circuit formed by the 4 wires?
 
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Yes. Each will get an EMF in the opposite direction, leading to a current loop.
 
Another way of looking at it is that the area of the circuit is shrinking, and so, therefore, is the magnetic flux, B.A, linking the circuit.
 

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