The Laplace transform of e-at sin ωt u(t) is:

This question was previously asked in
PGCIL Diploma Trainee EE Official Paper held on 27 October 2018
View all PGCIL Diploma Trainee Papers >

Answer (Detailed Solution Below)

Option 1 :
Free
PGCI DT EE Power System Mock Test
20 Qs. 20 Marks 15 Mins

Detailed Solution

Download Solution PDF

Concept:

Bilateral Laplace transform:

Unilateral Laplace transform:

Some important Laplace transforms:

 

f(t)

f(s)

ROC

1.

δ(t)

1

Entire s-plane

2.

e-at u(t)

s > - a

3.

e-at u(-t)

s < - a

4.

cos ω0 t u(t)

s > 0

5.

te-at u(t)

s > - a

6.

sin ω0t u(t)

s > 0

7.

u(t)

1/s

s > 0

 

Calculation:

By applying frequency differentiation property,

Latest PGCIL Diploma Trainee Updates

Last updated on May 9, 2025

-> PGCIL Diploma Trainee result 2025 will be released in the third week of May. 

-> The PGCIL Diploma Trainee Answer key 2025 has been released on 12th April. Candidates can raise objection from 12 April to 14 April 2025.

-> The PGCIL DT Exam was conducted on 11 April 2025. 

-> Candidates had applied online from 21st October 2024 to 19th November 2024.

-> A total of 666 vacancies have been released.

-> Candidates between 18 -27 years of age, with a diploma in the concerned stream are eligible.

-> Attempt PGCIL Diploma Trainee Previous Year Papers for good preparation.

Hot Links: teen patti 50 bonus teen patti master king yono teen patti