AC generator -- Understanding coil voltages as function of position

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SUMMARY

The discussion focuses on the behavior of voltage in an AC generator, specifically how coil position relative to the magnetic field affects induced voltage. Voltage reaches its maximum when the coil is parallel to the magnetic field (B), resulting in zero flux change, while voltage is zero when the coil is perpendicular to the magnetic field, leading to maximum flux change. The key takeaway is that the rate of change of magnetic flux through the coil is what induces voltage, with maximum induced voltage occurring when the coil cuts through the magnetic field lines at the highest speed.

PREREQUISITES
  • Understanding of electromagnetic induction principles
  • Familiarity with AC generator operation
  • Knowledge of magnetic flux concepts
  • Basic physics of coil orientation in magnetic fields
NEXT STEPS
  • Study Faraday's Law of Electromagnetic Induction
  • Learn about the role of coil rotation speed in AC generators
  • Explore the relationship between magnetic field strength and induced voltage
  • Investigate the effects of coil design on voltage output in AC generators
USEFUL FOR

Physics students, electrical engineers, and anyone interested in the principles of electromagnetic induction and AC generator functionality.

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Homework Statement


In an ac generator
Voltage is maximum when the coil is parallel to the direction of magnetic field (B)
Voltage is minimum (0) when the coil is perpendicular to the direction of magnetic field (B)

I'm trying to understand why.

Homework Equations

The Attempt at a Solution


A voltage is induced when there is a change in flux.
When the coil is parallel to the magnetic field the flux going through it is 0.
When the coil is perpendicular to the magnetic field the flux going through it is maximum.

I understand that it is the CHANGE in flux that causes a current to be induced. But I am still a bit confused about WHY the viltage is maximum when the coil is parallel to the field
 
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When are the flux lines being cut with the greatest speed? When the loop is moving parallel or perpendicular to the flux lines?
 

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