Question

In  the time domain, unit step signal is represented by:
1. r(t)
2. ∂(t)
3. u(t)
4. \(\frac{t^2}{2}\)

Answer 1

Correct Answer - Option 3 : u(t)

The unit step signal is defined as:

\(u(t) = \begin{cases} 1 &{for~t\ge0}\\ 0&{for~t<0} \end{cases}\)

\(\int_{-\infty}^{\infty} |u(t)|~dt=\infty \)