BTEC Applied Science - Physics Exam Questions. Explain 2 advantages of using digital signals instead of analogue signals to transmit television
programmes. (2 marks) - ANSWER1. Digital Signals can carry more info than Analogue signals.
2. Less interference so better quality is produced.
Give 2 o...
State what is meant by the term analogue signal (1 mark) - ANSWERA signal that can have any value
State what is meant by the term digital signal (1 mark) - ANSWERA signal that has 2 values only which
are 0 and 1.
Explain 2 advantages of using digital signals instead of analogue signals to transmit television
programmes. (2 marks) - ANSWER1. Digital Signals can carry more info than Analogue signals.
2. Less interference so better quality is produced.
Give 2 other differences between visible light waves and sound waves. (2 marks) - ANSWER1. Visible
light is electromagnetic whereas sound is a vibration
2. Sound waves has a lower frequency than visible light.
Explain the advantages and disadvantages of using radio waves instead of light waves to send large
amounts of information from the satellite to the surface of the Earth. (4 marks) - ANSWER1. Light waves
have a higher frequency than radio waves so light waves would take less time to transfer information.
2. Some of the radio waves reach the Earth's surface so they receive a clear signal.
Evaluate the strengths and weaknesses of using:
• An infrared remote control
• A Bluetooth remote control
to control the home cinema system. (6 marks) - ANSWER1. Infrared doesn't interfere with other devices
- has higher frequency than Bluetooth
2. This means there will be better quality between the devices.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller STUDYLAB2023. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $16.49. You're not tied to anything after your purchase.