A periodic signal $x(t)$ of period $T_0$ is given by
$$ x(t)= \begin{cases}1, & |t|<T_1 \\ 0, & T_1<|t|<\frac{T_0}{2}\end{cases} $$
The $\text{d.c}$. component of $x(t)$ is
- $\frac{\mathrm{T}_1}{\mathrm{T}_0}$
- $\frac{\mathrm{T}_1}{2 \mathrm{T}_0}$
- $\frac{2 \mathrm{T}_1}{\mathrm{T}_0}$
- $\frac{\text{T}_0}{\text{T}_1}$