Which of the following is electromagnetic interference (EMI) that is noise from the radiation generated by the
difference between the hot and ground wires?

A.
traverse-mode noise

B.
common-mode noise

C.
crossover-mode noise

D.
transversal-mode noise

Explanation:
Noise in power systems refers to the presence of electrical radiation in the system that is unintentional and
interferes with the transmission of clean power.
There are several types of noise, the most common being Electromagnetic Interference (EMI ) and Radio
Frequency Interference (RFI ).
EMI is noise that is caused by the generation of radiation due to the charge difference between the three
electrical wires — the hot, neutral, and ground wires.
Two common types of EMI generated by electrical systems are:
1. Common-mode noise. Noise from the radiation generated by the difference between the hot and ground
wires.
2. Traverse-mode noise. Noise from the radiation generated by the difference between the hot and neutral
wires.
Incorrect Answers:
A: Traverse-mode noise is noise from the radiation generated by the difference between the hot and neutral
wires, not between the hot and ground wires. Therefore, this answer is incorrect.
C: Crossover-mode noise is not one of the two defined types of EMI generated by electrical systems.
Therefore, this answer is incorrect.
D: Transversal -mode noise is not one of the two defined types of EMI generated by electrical systems.
Therefore, this answer is incorrect.

Krutz, Ronald L. and Russell Dean Vines, The CISSP and CAP Prep Guide: Mastering CISSP and CAP, Wiley
Publishing, Indianapolis, 2007, p. 458