Absence of m.field around an AC current carrying wire

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SUMMARY

There is always a magnetic field around a wire carrying an alternating current (AC), as established by Ampere's Law. The discussion clarifies that while a single wire generates a magnetic field, the presence of a second wire carrying a return current can minimize the overall magnetic field in close proximity, such as in a two-wire lamp cord configuration. This phenomenon is crucial for understanding electromagnetic principles in electrical engineering.

PREREQUISITES
  • Ampere's Law
  • Basic principles of electromagnetism
  • Understanding of AC and DC current
  • Knowledge of wire configurations in electrical circuits
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  • Study Ampere's Law in detail
  • Explore the effects of wire configurations on magnetic fields
  • Investigate the principles of electromagnetic induction
  • Learn about the applications of AC and DC in electrical engineering
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Electrical engineers, physics students, and anyone interested in the principles of electromagnetism and electrical circuit design.

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One of my friend says that it is possible that there will be no magnetic filed around an AC current carrying wire but he did,t know about the reason. can anyone give the reason
 
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There is always a magnetic field around a single wire carrying a current, either AC or DC. Use Ampere's Law to calculate. If it is a pair of wires in close proximity (like a two-wire lamp cord), with one wire carrying a return current, the magnetic field is minimal.

Bob S
 

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