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## Marks 1

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The bilateral Laplace transform of a function $$f\left( t \right) = \left\{ {\matrix{ {1\,if\,a \le t \le b} \cr ... GATE ECE 2015 Set 2 The input$$ - 3{e^{2t}}\,\,u\left( t \right)$$, where u(t) is the unit step function$$\, {{s - 2} \over {s + 3}}$$. If ... GATE ECE 2014 Set 3 A continuous, linear time - invariant fiilter has an impulse response h(t) described by$$h\left( t \right) = \left\{ {\...
GATE ECE 2014 Set 1
If the Laplace transform of a signal y(t) is $$Y\left( s \right) = {1 \over {s\left( {s - 1} \right)}},$$ then its final...
GATE ECE 2007
The Laplace transform of i(t) tends to $$I\left( s \right)\,\, = \,{2 \over {s\left( {1 + s} \right)}}$$ As $$t \to \i... GATE ECE 2003 Given that$$L\left[ {f\left( t \right)} \right]\, = \,{{s + 2} \over {{s^2} + 1}},\$L\left[ {g\left( t \right...
GATE ECE 2000
$$If\,\,L\left[ {f\left( t \right)} \right]\, = \,F\left( s \right),$$ then $$L\left[ {f\left( {t - T} \right)} \right]... GATE ECE 1999 If L$$\left[ {f\left( t \right)} \right]$$=$$\omega /\left( {{s^2} + {\omega ^2}} \right),$$then the value of$$\matr...
GATE ECE 1998
The Laplace Transform of eat .cos$$\left( {\alpha t} \right).u\left( t \right)$$ is equal to
GATE ECE 1997
If L$$\left[ {f\left( t \right)} \right]$$ = $${{2\left( {s + 1} \right)} \over {{s^2} + 2s + 5}}$$, then $$f\left( {0 +... GATE ECE 1995 The final value theorem is used to find the GATE ECE 1995 The laplace transform of a unit ramp function starting at t=a, is GATE ECE 1994 ## Marks 2 More The Laplace transform of the casual periodic square wave of period T shown in the figure below is ... GATE ECE 2016 Set 1 Let x(t) = a s(t) +s(-t) with s(t) =$$\beta {e^{ - 4t}}u\left( t \right)$$, where u(t) is unit step function. If the bi... GATE ECE 2015 Set 2 The solution of the differential equation$${{h\left( {t + 1} \right)} \over {h\left( t \right)}}\,\,\,\,\,{{{d^2}y} \ov...
GATE ECE 2015 Set 1
A casual LTI system has zero initial conditions and impulse response h(t). Its input x(t) and output y(t) are related th...
GATE ECE 2014 Set 4
A stable linear time invariant (LTI) system has a transfer function H(s) = $${1 \over {{s^2} + s - 6}}$$. To make this s...
GATE ECE 2014 Set 4
The unilateral Laplace transform of F(t) is $${1 \over {{s^2} + s + 1}}$$. Which one of the following is the unilateral ...
GATE ECE 2014 Set 4
Let h(t) denote the impulse response of a casual system with transfer function $${1 \over {s + 1}}$$. Consider the follo...
GATE ECE 2014 Set 3
A system is described by the following differential equation, where u(t) is the input to the system and y(t) is output o...
GATE ECE 2014 Set 1
A system is described by the differential equation $${{{d^2}y} \over {d{t^2}}} + 5{{dy} \over {dt}} + 6y\left( t \right... GATE ECE 2013 If$$F\left( s \right) = L\left[ {f\left( t \right)} \right] = {{2\left( {s + 1} \right)} \over {{s^2} + 4s + 7}}$$then... GATE ECE 2011 Given f(t) =$${L^{ - 1}}\left[ {{{3s + 1} \over {{s^3} + 4{s^2} + \left( {K - 3} \right)s}}} \right].$$If$$\matrix{ ...
GATE ECE 2010
Given that F(s) is the one-sided Laplace transform of f(t), the Laplace transform of $$\int\limits_0^t {f\left( \tau \r... GATE ECE 2009 Consider the function f(t) having Laplace transform$$F\left( s \right) = {{{\omega _0}} \over {{s^2} + {\omega _0}^2}}...
GATE ECE 2006
In what range should Re(s) remain so that the Laplace transform of the function e(a+2)t+5 exists?
GATE ECE 2005
The Laplace transform of a continuous - time signal x(t) is $$X\left( s \right) = {{5 - s} \over {{s^2} - s - 2}}$$. If ...
GATE ECE 2002
The inverse Laplace transform of the function $${{s + 5} \over {\left( {s + 1} \right)\left( {s + 3} \right)}}$$ is
GATE ECE 1996
The Laplace transform of the periodioc function f(t) describe4d by the curve below, i.e., $$f\left( t \right) = \left\{ ... GATE ECE 1993 If$$F\left( s \right) = L\left[ {f\left( t \right)} \right] = {K \over {\left( {s + 1} \right)\,\left( {{s^2} + ...
GATE ECE 1993
The Laplace transform of a function f(t)u(t), where f(t) is periodic with period T, is A(s) times the Laplace transform ...
GATE ECE 1988
Laplace transform of the functions t u(t) and u(t) sin(t) are respectively:
GATE ECE 1987

## Marks 5

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A sinsoidal signal, v(t) = A sin(t), is applied to an ideal full-wave rectifier. Show that the Laplace Transform of the...
GATE ECE 1995
Find the Laplace transform of the waveform x(t) shown in Fig.1. ...
GATE ECE 1991

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