B-Field Phase: AC Voltage vs. AC Current

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    B-field Phase
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SUMMARY

The discussion centers on the relationship between the AC component of the magnetic field (B-field) generated by Helmholtz coils and the applied AC current. It is established that the AC component of the B-field is in phase with the AC current rather than the AC voltage. This conclusion is based on the principle that currents induce magnetic fields, confirming the direct correlation between current and magnetic field phase alignment.

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  • Understanding of electromagnetic theory
  • Knowledge of Helmholtz coil configurations
  • Familiarity with AC and DC current principles
  • Basic concepts of magnetic field generation
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  • Explore the behavior of Helmholtz coils in varying current conditions
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locke
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Imagine I take a pair of helmholtz coils and apply a DC current, modulated by a much smaller AC current so that the B-field between the coils varies sinusoidally about some fixed value. Will the AC component of B be in phase with the AC voltage, or the AC current?
 
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Waitaminute, it's obviously in phase with I. Currents induce magnetic fields, not voltages. Sorry guys, think it's past my bedtime...
 

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