Practice Sifting Property - 12.3 | 12. Dirac Delta Function | Mathematics (Civil Engineering -1)
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12.3 - Sifting Property

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What does the sifting property of the Dirac delta function allow you to do?

💡 Hint: Think about how the function behaves when multiplied by the delta function.

Question 2

Easy

In simple terms, how would you describe the Dirac delta function?

💡 Hint: Focus on where the function's significant value lies.

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Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What is the sifting property of the Dirac delta function?

  • It allows summation of functions.
  • It extracts the function value at a specific point.
  • It averages function values over regions.

💡 Hint: Think about its utility in extraction of values.

Question 2

When evaluating \( \int_{-\infty}^{\infty} f(x) \delta(x-a) dx \), what is the result?

  • f(a)
  • 0
  • undefined

💡 Hint: Consider how delta functions behave during integration.

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Challenge Problems

Push your limits with challenges.

Question 1

You have a function f(x) = sin(x) and want to evaluate \( \int_{-\infty}^{\infty} f(x) \delta(x - \frac{}{2}) dx \). What is the result and why?

💡 Hint: Apply the sifting property directly.

Question 2

Discuss how the sifting property would change if the function was represented by a step function instead, such as Heaviside's function. How would values be extracted?

💡 Hint: Consider the behavior of step functions when approached with delta functions.

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