Which three elements constitute the EMI triangle?

Which three elements constitute the EMI triangle?

• A. Interference source, sensitive victim, coupling path
• B. Grounding, Bonding, Shielding
• C. Electric, Magnetic, Radio
• D. Source, Victim, Ground

Answer: (A)

The idea being tested is how electromagnetic interference (EMI) is structured. In the EMI triangle, three elements must be present: an interference source that generates noise, a sensitive victim that can be affected by the noise, and a coupling path that carries energy from the source to the victim. The source emits disturbance, the victim is susceptible, and the coupling path can be conductive, radiated, or inductively coupled. Understanding this helps you see why EMI happens and how to reduce it: you can weaken the source, improve the victim’s immunity with filters and shielding, or disrupt the coupling path with better layout, shielding, or filtering. The other options don’t fit the triangle: grounding/bonding/shielding are protective techniques rather than the three core elements; Electric, Magnetic, Radio describe kinds of interference, not the interaction; or substitute ground for the coupling path, which misses that the path can take multiple forms.

The idea being tested is how electromagnetic interference (EMI) is structured. In the EMI triangle, three elements must be present: an interference source that generates noise, a sensitive victim that can be affected by the noise, and a coupling path that carries energy from the source to the victim. The source emits disturbance, the victim is susceptible, and the coupling path can be conductive, radiated, or inductively coupled. Understanding this helps you see why EMI happens and how to reduce it: you can weaken the source, improve the victim’s immunity with filters and shielding, or disrupt the coupling path with better layout, shielding, or filtering. The other options don’t fit the triangle: grounding/bonding/shielding are protective techniques rather than the three core elements; Electric, Magnetic, Radio describe kinds of interference, not the interaction; or substitute ground for the coupling path, which misses that the path can take multiple forms.