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Laplace Transform – 1 – 1

1. Laplace transform of the unit impulse function δ(t– a) is :

(a) e–as
(b) eas
(c) e–t
(d) None of these

ANSWER

EXPLANATION

2. L [eat] is:

(a) 1/s+a
(b) 1/s
(c) 1/s-a
(d) None of these 

ANSWER

EXPLANATION

3. The Laplace transform of t3 δ(t– 4) is :

(a) 43 e–4s
(b) 34 e3s
(c) e4s 32
(d) None of these

ANSWER

EXPLANATION

4. L[f ′(t)] is :

(a) S L[f(t)] – f(0)
(b) F(s)
(c) S L[f(t)]
(d) None of these

ANSWER

EXPLANATION

5. L [et] is:

(a) 1/s-log2
(b) 1/s+log2
(c) 1/s+2
(d) None of these 

ANSWER

EXPLANATION

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