📝 Transmission Impairment

📖 From Data Communication & Networks • 3. Physical Layer Introduction • 31 questions available

Practice MCQs for Transmission Impairment. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-06-28

Easy Questions

Medium Questions

Hard Questions

Q1. What is attenuation in the context of signal transmission?

🔹 A. The change in the signal's shape.

🔹 B. The loss of energy as the signal travels through a medium.

🔹 C. The addition of unwanted signals to the original signal.

🔹 D. The variation in the signal's amplitude.

💡 Difficulty: easy | ✅ Correct: B

Q2. What is thermal noise?

🔹 A. Noise caused by other electrical devices.

🔹 B. The random motion of electrons in a wire.

🔹 C. Noise caused by power lines.

🔹 D. Noise caused by lightning.

💡 Difficulty: medium | ✅ Correct: B

Q3. What is the SNR in dB if the signal power is 0.5 W and the noise power is 0.05 W?

🔹 A. 10 dB

🔹 B. 20 dB

🔹 C. 30 dB

🔹 D. 40 dB

💡 Difficulty: hard | ✅ Correct: A

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