Trial Q (1 Viewer)

[krypticlemonjuice]

How do we do questions like this?? How do we know what emr is produced by electrical circuits?

 

[wizzkids]

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?