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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does it mean to compress a signal?
π‘ Hint: Think about shortening the timeline of the events.
Question 2
Easy
When does expansion occur in time scaling?
π‘ Hint: Consider making the signal take longer to occur.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What happens to a signal when the scaling factor 'a' is greater than 1?
- It compresses
- It expands
- It reverses
π‘ Hint: Consider a race car speeding up on a track.
Question 2
True or False: If 'a' is negative, the signal can be both reversed and scaled.
- True
- False
π‘ Hint: Visualize flipping the signal over a mirror.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
If signal x(t) = cos(t) undergoes a time scaling with a factor of -2, what new signal results and why?
π‘ Hint: Recall the cosine function's symmetry and how negative factors affect outputs.
Question 2
Create a signal function that goes through both compression and expansion. What final effect do these operations convey?
π‘ Hint: Remember the sequential application influences outcome.
Challenge and get performance evaluation