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Question 20266
JEE Physics · Hard

Principles of Communication: Mobile Communication MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Mobile CommunicationHardQuestion 20266

Question

What is the main difference between 2G and 3G mobile communication?
  1. A
    2G uses analog voice; 3G uses digital
  2. B
    2G is digital but primarily voice; 3G adds high-speed packet data (UMTS/HSPA)
    Correct
  3. C
    3G uses FM; 2G uses AM
  4. D
    2G uses satellite links; 3G uses ground cells

Correct answer

2G is digital but primarily voice; 3G adds high-speed packet data (UMTS/HSPA)

Explanation

1G: analog (AMPS). 2G: digital voice (GSM/CDMA, ~9.6 kbps data). 3G: UMTS/WCDMA, 384 kbps – 14.4 Mbps (HSPA). 4G LTE: up to 150 Mbps+ using OFDMA. 5G: sub-6 GHz + mmWave, Gbps peak rates, low latency.

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