ITPEC FE Morning April 2022 Question 72
ITPEC FE Morning April 2022 — Question 72 of 80
In an RFID system, an RF reader/writer generates an electromagnetic field.
This field powers passive RF tags (which have no battery) and enables them
to transmit stored data back to the reader wirelessly.
Why not others:
- (a) RF tags do not communicate with each other — RFID is a reader-to-tag
system, not a peer-to-peer mesh network.
- (c) Using satellites for longitude/latitude tracking describes GPS,
not RFID.
- (d) RFID is a wireless technology by definition; it does not use wired
connections.
Key rule: RFID = reader generates EM field → powers passive tag → tag
transmits data back. No batteries, no satellites, no mesh.
AI-generated — may contain errors
The original exam layout is preserved in the image so diagrams, formulas, tables, and code remain accurate.
This question comes from an official ITPEC past paper. ITPEC Practice is an independent study tool and is not affiliated with ITPEC. See the official FE past-paper collection or Report an issue.