Physics 9702: COMMUNICATION Topical Past Paper Questions
Cambridge AS & A Level Physics (9702) past-paper questions on COMMUNICATION, free. This topic is occasionally examined across 23 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
An analogue signal is to be transmitted to a receiver. Before transmission, the signal passes through an analogue-to-digital converter (ADC). After transmission it passes through a digital-to-analogue converter (DAC) before finally reaching the receiver, as shown in Fig. 5.1. Fig…
(a) Explain the principles of the generation of ultrasound waves for use in medical diagnosis. [4] (b) The linear attenuation (absorption) coefficient for a parallel beam of ultrasound waves in air is $ 1.2 \, cm^{-1} $. The parallel beam passes through a layer of air of thicknes…
(a) A section of a coaxial cable is shown in Fig. 5.1. Fig. 5.1 (i) Suggest two functions of the copper braid. [2] (ii) Suggest one application of a coaxial cable for the transmission of electrical signals. [1] (b) (i) The constant noise power in a transmission cable is 7.6 $ \mu…
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