A-LevelPhysicsWavesFeb/Mar 2017Paper 4 Q58 Marks
(b) An optic fibre of length 57km is connected between a transmitter and a receiver, as shown in Fig. 5.1. transmitter signal power 15 × 10⁻³ W 57 km optic fibre receiver signal power P noise power 9.0 × 10⁻⁷ W Fig. 5.1 The attenuation per unit length of the optic fibre is 0.50 dB km⁻¹. The transmitter provides an input signal of power 15 × 10⁻³ W to the fibre. The noise power at the receiver is 9.0 × 10⁻⁷ W.
✓ Correct Answer
The correct answer is —. This question tests the candidate's understanding of waves within the Physicssyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep