BTEC APPLIED SCIENCE - PHYSICS EXAM QUESTIONS WITH CORRECT ANSWERS|100% verified

BTEC APPLIED SCIENCE - PHYSICS EXAM QUESTIONS WITH CORRECT ANSWERS State what is meant by the term analogue signal (1 mark) CORRECT ANSWER A signal that can have any value State what is meant by the term digital signal (1 mark) CORRECT ANSWER A 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 programs. (2 marks) CORRECT ANSWER 1. 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) CORRECT ANSWER 1. Visible light is electromagnetic whereas sound is a vibration 2. Sound waves has a lower frequency than visible light.