The signal defined by the equations f(t) = 0 for t < 0, f(t) = E for 0 ≤ t ≤ a and f(t) = 0 for t > a is

[A].	a step function
[B].	a pulse function
[C].	a shifted step function originating at t = a
[D].	none of the above

Answer: Option B

Explanation:

It is a pulse lasting for t = a.