Operational Calculus

Description: This quiz will test your understanding of Operational Calculus, a branch of mathematics that deals with the application of integral transforms to solve differential equations.
Number of Questions: 14
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Tags: operational calculus integral transforms differential equations
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Which of the following is not a type of integral transform used in Operational Calculus?

  1. Laplace Transform

  2. Fourier Transform

  3. Mellin Transform

  4. Hankel Transform


Correct Option: D
Explanation:

The Hankel Transform is not a type of integral transform used in Operational Calculus. It is used in other areas of mathematics and physics, such as the study of Bessel functions.

What is the Laplace transform of $e^{at}$?

  1. $\frac{1}{s-a}$

  2. $\frac{s}{s-a}$

  3. $\frac{1}{s+a}$

  4. $\frac{s}{s+a}$


Correct Option: A
Explanation:

The Laplace transform of $e^{at}$ is $\frac{1}{s-a}$.

What is the inverse Laplace transform of $\frac{1}{s^2+a^2}$?

  1. $\frac{1}{a}\sin(at)$

  2. $\frac{1}{a}\cos(at)$

  3. $\frac{1}{2a}\sin(at)$

  4. $\frac{1}{2a}\cos(at)$


Correct Option: A
Explanation:

The inverse Laplace transform of $\frac{1}{s^2+a^2}$ is $\frac{1}{a}\sin(at)$.

Which of the following properties of the Laplace transform states that $L{f'(t)}=sF(s)-f(0^+)$?

  1. Linearity Property

  2. Differentiation Property

  3. Integration Property

  4. Convolution Property


Correct Option: B
Explanation:

The Differentiation Property of the Laplace transform states that $L{f'(t)}=sF(s)-f(0^+)$.

What is the Laplace transform of the unit step function $u(t)$?

  1. $\frac{1}{s}$

  2. $\frac{1}{s^2}$

  3. $\frac{1}{s+1}$

  4. $\frac{1}{s-1}$


Correct Option: A
Explanation:

The Laplace transform of the unit step function $u(t)$ is $\frac{1}{s}$.

Which of the following is the convolution theorem for the Laplace transform?

  1. $L{f(t)*g(t)}=F(s)G(s)$

  2. $L{f(t)*g(t)}=F(s)+G(s)$

  3. $L{f(t)*g(t)}=F(s)-G(s)$

  4. $L{f(t)*g(t)}=F(s)\cdot G(s)$


Correct Option: A
Explanation:

The convolution theorem for the Laplace transform states that $L{f(t)*g(t)}=F(s)G(s)$.

What is the Laplace transform of the Dirac delta function $\delta(t)$?

  1. $1$

  2. $0$

  3. $\infty$

  4. $\frac{1}{s}$


Correct Option: A
Explanation:

The Laplace transform of the Dirac delta function $\delta(t)$ is $1$.

Which of the following is the final value theorem for the Laplace transform?

  1. $\lim_{t\to\infty}f(t)=\lim_{s\to 0}sF(s)$

  2. $\lim_{t\to\infty}f(t)=\lim_{s\to\infty}sF(s)$

  3. $\lim_{t\to 0}f(t)=\lim_{s\to 0}sF(s)$

  4. $\lim_{t\to 0}f(t)=\lim_{s\to\infty}sF(s)$


Correct Option: A
Explanation:

The final value theorem for the Laplace transform states that $\lim_{t\to\infty}f(t)=\lim_{s\to 0}sF(s)$.

What is the Laplace transform of the Heaviside step function $H(t)$?

  1. $\frac{1}{s}$

  2. $\frac{1}{s^2}$

  3. $\frac{1}{s+1}$

  4. $\frac{1}{s-1}$


Correct Option: C
Explanation:

The Laplace transform of the Heaviside step function $H(t)$ is $\frac{1}{s+1}$.

Which of the following is the initial value theorem for the Laplace transform?

  1. $\lim_{t\to 0^+}f(t)=\lim_{s\to\infty}sF(s)$

  2. $\lim_{t\to 0^+}f(t)=\lim_{s\to 0}sF(s)$

  3. $\lim_{t\to\infty}f(t)=\lim_{s\to 0}sF(s)$

  4. $\lim_{t\to\infty}f(t)=\lim_{s\to\infty}sF(s)$


Correct Option: A
Explanation:

The initial value theorem for the Laplace transform states that $\lim_{t\to 0^+}f(t)=\lim_{s\to\infty}sF(s)$.

What is the Laplace transform of the exponential function $e^{-at}$?

  1. $\frac{1}{s+a}$

  2. $\frac{s}{s+a}$

  3. $\frac{1}{s-a}$

  4. $\frac{s}{s-a}$


Correct Option: A
Explanation:

The Laplace transform of the exponential function $e^{-at}$ is $\frac{1}{s+a}$.

Which of the following properties of the Laplace transform states that $L{\int_0^t f(\tau)d\tau}=\frac{F(s)}{s}$?

  1. Linearity Property

  2. Differentiation Property

  3. Integration Property

  4. Convolution Property


Correct Option: C
Explanation:

The Integration Property of the Laplace transform states that $L{\int_0^t f(\tau)d\tau}=\frac{F(s)}{s}$.

What is the Laplace transform of the cosine function $\cos(at)$?

  1. $\frac{s}{s^2+a^2}$

  2. $\frac{a}{s^2+a^2}$

  3. $\frac{s}{s^2-a^2}$

  4. $\frac{a}{s^2-a^2}$


Correct Option: A
Explanation:

The Laplace transform of the cosine function $\cos(at)$ is $\frac{s}{s^2+a^2}$.

Which of the following is the shifting theorem for the Laplace transform?

  1. $L{f(t-a)u(t-a)}=e^{-as}F(s)$

  2. $L{f(t-a)u(t-a)}=e^{as}F(s)$

  3. $L{f(t+a)u(t+a)}=e^{-as}F(s)$

  4. $L{f(t+a)u(t+a)}=e^{as}F(s)$


Correct Option: A
Explanation:

The shifting theorem for the Laplace transform states that $L{f(t-a)u(t-a)}=e^{-as}F(s)$.

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