Marks 1
1
If $u(t)$ is the unit step function, then the region of convergence (ROC) of the Laplace transform of the signal $x(t) = e^{t^2}[u(t-1)-u(t-10)]$ is
GATE EE 2024
2
The Laplace transform of f(t)=$$2\sqrt{t/\mathrm\pi}$$ is $$s^{-3/2}$$. The Laplace transform of g(t)=$$\sqrt{1/\mathrm{πt}}$$ is
GATE EE 2015 Set 2
3
Which one of the following statements is NOT TRUE for a continuous time causal
and stable LTI system?
GATE EE 2013
4
The unilateral Laplace transform of f(t) is
$$\frac1{s^2\;+\;s\;+\;1}$$. The unilateral Laplace transform of tf(t) is
GATE EE 2012
5
Let Y(s) be the Laplace transformation of the function y(t), then the final value of the function is
GATE EE 2002
6
The Laplace transformation of f(t) is F(s). Given F(s)=$$\frac\omega{s^2+\omega^2}$$, the final value of f(t) is
GATE EE 1995
Marks 2
1
Let the Laplace transform of a function f(t) which exists for t > 0 be F1(s) and
the Laplace transform of its delayed version f(1 - $$\tau$$) be F2(s). Let F1*(s) be the
complex conjugate of F1(s) with the Laplace variable set as $$s=\sigma\;+\;j\omega$$. If G(s) =$$\frac{F_2\left(s\right).F_1^\ast\left(s\right)}{\left|F_1\left(s\right)\right|^2}$$
, then the inverse Laplace transform of G(s) is
GATE EE 2011
2
A function y(t) satisfies the following differential equation:$$$\frac{\operatorname dy\left(t\right)}{\operatorname dt}+\;y\left(t\right)\;=\;\delta\left(t\right)$$$
where $$\delta\left(t\right)$$ is the delta function. Assuming zero initial condition, and denoting the unit step function by u(t), y(t) can be of the form
GATE EE 2008
3
The Laplace transform of a function f(t) is F(s) = $$\frac{5s^2+23s+6}{s\left(s^2+2s+2\right)}$$. As $$t\rightarrow\infty$$, f(t) approaches
GATE EE 2005
4
For the equation $$\ddot x\left(t\right)+3\dot x\left(t\right)+2x\left(t\right)=5$$, the solution x(t) approaches which of the following values as t$$\rightarrow\infty$$ ?
GATE EE 2005
5
A rectangular current pulse of duration T and magnitude 1 has the Laplace transform
GATE EE 1999
6
The Laplace transform of $$\left(t^2\;-\;2t\right)u\left(t\;-\;1\right)$$ is
GATE EE 1998