krypticlemonjuice
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How do we do questions like this?? How do we know what emr is produced by electrical circuits?
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How do we do questions like this?? How do we know what emr is produced by electrical circuits?
wizzkids
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To answer this question, you need to go back to Year 11 content from Waves and Thermodynamics. To achieve a high electromagnetic field around a wire, you need to achieve resonance, and a standing wave represents resonance. Therefore the length of the wire is related to the positions of nodes and antinodes, and therefore the length is related to the wavelength of the e-m waves.
Think of the wire as if it was an oscillating guitar string, except instead of the energy being contained in a mechanical wave, the energy is contained in an electrical wave.
Now can you answer the question?
Think of the wire as if it was an oscillating guitar string, except instead of the energy being contained in a mechanical wave, the energy is contained in an electrical wave.
Now can you answer the question?