Physics - Unit

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1. Television programmes can be transmitted through optical fibres using digital signals. Explain another advantage of using digital signals instead of analogue signals to transmit television programmes

  • Interference can be removed from the signals/ more noise so that a clearer output is produced compared to a digital signal.
  • Noise can be removed from the signals/ less interference so that a clearer output is produced compared to an analogue signal.
  • Noise can be removed from the signals/ more interference so that a clearer output is produced compared to a digital signal.
  • Noise can be removed from the signals/ more interference so that a clearer output is produced compared to an analogue signal.
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Other questions in this quiz

2. What is the flow of analogue signals

  • information source -> input transducer -> transmitter -> Chanel-> output transducer -> receiver
  • information source -> output transducer -> transmitter -> Chanel-> receiver -> input transducer.
  • information source -> input transducer -> transmitter -> Chanel-> receiver -> output transducer.
  • Chanel-> input transducer -> transmitter -> information source -> receiver -> output transducer.

3. What is sample rate?

  • Bit depth and sample rate will affect loss of information.
  • Bit depth and sample rate will affect loss of connections.
  • The number of samples taken per second (frequency).
  • The amount of information in the sample and its affects the value that can be given to the amplitude per sample and so will affect the accuracy of the sample.

4. What is bit depth?

  • The amount of information in the sample and its affects the value that can be given to the amplitude per sample and so will affect the accuracy of the sample.
  • the number of samples per second (frequency).
  • Bit depth and sample rate will affect loss of connections.
  • Bit depth and sample rate will affect loss of information.

5. Explain step 4 when converting an analogue signal to a digital signal.

  • Select the smallest appropriate unit for converting the voltage signal into data.
  • Transmit the data through an aerial or optical fibre.
  • Sample the analogue signal using the analogue-to-digital converter.
  • The cable must be screened by earthling to avoid electrical interference.

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