With reference to 'Near Field Communication (NFC) Technology', which of the following statements is/are correct? 1. It is a contactless communication technology that uses electromagnetic radio fields. 2. NFC is designed for use by devices which can be at a distance of even a metre from each other. 3. NFC can use encryption when sending sensitive information. Select the correct answer using the codes given below.
Contents12
- A1 and 2 only
- B3 only
- C1 and 3 only
- D1, 2 and 3
Show answer
Answer: (C) 1 and 3 only
NFC (Near Field Communication) is a set of short-range wireless communication protocols.
It was in the news because banks like ICICI launched NFC-enabled 'Tap and Pay' services, and RBI relaxed two-factor authentication for NFC payments up to Rs. 2000.
Statement 1 is correct: NFC is indeed a contactless communication technology that uses electromagnetic radio fields to transfer data between two devices.
It operates at 13.56 MHz frequency.
You see it used in contactless card payments, metro cards (like Delhi Metro), and phone-to-phone data sharing.
Statement 2 is INCORRECT: This is the key trap.
NFC is designed for VERY short range — typically 4 cm (about 1.5 inches) or less, NOT up to a metre.
The 'Near' in Near Field Communication means exactly that — the devices must be very close or almost touching.
This is actually a security feature, as it prevents someone far away from intercepting the communication.
Compare this with Bluetooth (up to 10 metres) or Wi-Fi (up to 100 metres) — NFC deliberately keeps the range tiny.
Statement 3 is correct: NFC can use encryption to protect sensitive information during transmission.
This is essential for secure applications like mobile payments and access cards, where financial or personal data is being transferred.
Answer: 1 and 3 only.
NFC enables contactless payments and data transfer at very short distances of about 4 cm, making it secure for financial transactions.
In 2014-15, Indian banks like ICICI launched NFC-enabled 'Tap and Pay' services and RBI relaxed authentication requirements for small NFC payments, making this technology current affairs relevant.
The key trap is confusing NFC's extremely short range (4 cm) with longer-range technologies like Bluetooth (10 meters) or Wi-Fi.
Near Field Communication (NFC) Technology
Science And Technology Near Field Communication NFC Technology contactless communication
NFC Technology: Range, Mechanism & Security Features
NFC operates at 13.56 MHz using electromagnetic radio fields for contactless data transfer
Range is extremely short: 4 cm or less (not up to 1 metre)
Supports encryption for secure transmission of sensitive data
Used in contactless payments, metro cards, and phone-to-phone sharing
What is NFC
Near Field Communication (NFC) is a set of short-range wireless communication protocols that enables data exchange between devices placed very close together. It uses electromagnetic radio fields at 13.56 MHz frequency to transfer information without physical contact.
NFC vs Other Technologies
Technology | Range | Frequency | Primary Use |
|---|---|---|---|
NFC | 4 cm or less | 13.56 MHz | Contactless payments, access cards |
Bluetooth | Up to 10 metres | 2.4 GHz | Audio, file transfer, peripherals |
Wi-Fi | Up to 100 metres | 2.4/5 GHz | Internet connectivity, networking |
Key Features & Security
Contactless operation: No physical connection required between devices
Two-way communication: Devices can both send and receive data
Encryption support: Can secure sensitive information during transmission
Low power consumption: Passive devices can operate without their own power source
Inherent security: Extremely short range prevents remote eavesdropping
Question Connection
This 2015 question tested the common misconception about NFC range. Statement 2 was the trap - many students incorrectly think NFC works up to 1 metre like Bluetooth, but NFC deliberately keeps devices within 4 cm for security.
Range trap: NFC range is 4 cm or less, NOT up to 1 metre (that's Bluetooth territory)
Don't confuse NFC with Bluetooth or Wi-Fi - NFC is the shortest range technology
Security feature: The tiny range is intentional - prevents remote interception
NFC uses electromagnetic fields, not infrared or other wireless methods
NFC Applications & India Context
Science And Technology Tap and Pay ICICI RBI two-factor authentication
NFC in India: Banking, Transport & RBI Regulations
ICICI Bank launched NFC-enabled 'Tap and Pay' services in India
RBI relaxed two-factor authentication for NFC payments up to ₹2000
Delhi Metro uses NFC technology in contactless metro cards
Banking & Payments
NFC gained prominence in India when banks like ICICI launched contactless payment services. The Reserve Bank of India (RBI) recognised NFC's security advantages and relaxed two-factor authentication requirements for transactions up to ₹2000, making small payments more convenient.
NFC Applications in India
Sector | Application | Example | Key Benefit |
|---|---|---|---|
Banking | Contactless payments | ICICI Tap and Pay | Quick transactions under ₹2000 |
Transport | Metro cards | Delhi Metro cards | Fast entry/exit without swiping |
Mobile | Phone-to-phone sharing | Android Beam, file transfer | Instant data exchange |
Access Control | Smart cards | Office/hotel key cards | Secure entry systems |
RBI Policy Impact
Two-factor authentication relaxation: Not required for NFC payments under ₹2000
Security rationale: Short range makes NFC inherently more secure than online payments
Adoption boost: Simplified authentication encouraged merchants to adopt NFC terminals
Consumer convenience: Faster checkout experience in retail and transport
RBI limit: Two-factor authentication relaxed only up to ₹2000, not all NFC transactions
ICICI connection: Specific bank mentioned for NFC launch - could appear in current affairs
Don't assume all contactless payments are NFC - some use QR codes or other methods
Wireless Communication Technologies
Science And Technology
Wireless Technologies: Range, Frequency & Applications
NFC: 4 cm range, 13.56 MHz, for payments and access control
Bluetooth: 10m range, 2.4 GHz, for audio and peripherals
Wi-Fi: 100m range, 2.4/5 GHz, for internet connectivity
Technology Comparison Matrix
Technology | Range | Frequency | Power | Primary Use | Security Level |
|---|---|---|---|---|---|
NFC | 4 cm | 13.56 MHz | Very Low | Payments, Access | High (proximity) |
Bluetooth | 10 metres | 2.4 GHz | Low | Audio, Peripherals | Medium (pairing) |
Wi-Fi | 100 metres | 2.4/5 GHz | Medium | Internet, Networks | Variable (encryption) |
Infrared | 1-2 metres | 300 GHz-400 THz | Very Low | Remote controls | Low (line-of-sight) |
Zigbee | 10-100 metres | 2.4 GHz | Very Low | IoT, Home automation | Medium |
Wireless Technology Classification
# Wireless Communication
## Ultra Short Range
- NFC (4 cm)
- Infrared (1-2 m)
## Short Range
- Bluetooth (10 m)
- Zigbee (10-100 m)
## Medium Range
- Wi-Fi (100 m)
- WiMAX (50 km)
## Long Range
- Cellular (km)
- Satellite (global)Range confusion: Don't mix up NFC (4 cm) with Bluetooth (10 m) or Wi-Fi (100 m)
Frequency overlap: Bluetooth and Wi-Fi both use 2.4 GHz, but NFC uses 13.56 MHz
Security assumption: Shorter range doesn't always mean more secure - depends on encryption too
Power requirements: NFC can work with passive devices, others need active power