220-801 Question #857: Real Exam Question with Answer & Explanation

The correct answer is A: Strong magnets. Electromagnetic Interference (EMI) is unwanted electrical noise that disrupts electronic signals. Strong magnets (A) generate powerful magnetic fields that induce EMI in nearby conductors and electronics. AC power runs (E) - especially unshielded electrical wiring carrying altern

Question

Which of the following are potential sources of EMI? (Select TWO).

Options

AStrong magnets
BToaster ovens
CCordless phones
DFlat panel TVs
EAC power runs

Explanation

Electromagnetic Interference (EMI) is unwanted electrical noise that disrupts electronic signals. Strong magnets (A) generate powerful magnetic fields that induce EMI in nearby conductors and electronics. AC power runs (E) - especially unshielded electrical wiring carrying alternating current - emit electromagnetic fields that can interfere with data cables running parallel to them. This is why data cables should never run parallel to AC power lines without shielding. Cordless phones can cause RF interference but are typically classified separately; toaster ovens and flat panel TVs are not primary EMI concerns in networking/hardware contexts tested on the A+ exam.

Community Discussion

No community discussion yet for this question.

Full 220-801 Practice