📝 Guided media: Twisted Pair Cable

Q1. If a UTP cable has 25 twists per meter and the twist density is increased to 30 twists per meter, how does this change affect susceptibility to external electromagnetic noise?

💡 Difficulty: easy | ✅ Correct: B

Q2. In a single twist of a pair, one conductor is closer to a noise source than the other. In the next twist the positions are reversed. What is the net effect on the noise seen by the receiver?

💡 Difficulty: medium | ✅ Correct: C

Q3. A network uses 1000 ft of Cat5e UTP cable rated for 100 MHz. Approximate attenuation can be estimated by the formula \(A = 0.5 \times \sqrt{L}\) dB, where \(L\) is length in feet. What is the estimated attenuation?

💡 Difficulty: hard | ✅ Correct: C