**For a Unit ramp function area of pulse curve is unity****Options: **a) discontinuous at time t=0

b) starts at time t=0 and linearly increases with t

c) none of the above

Correct Answer: b) starts at time t=0 and linearly increases with t

**Explanation:**A Unit ramp function is a continuous time function that starts at time t=0 and linearly increases with t. Denoted by r (t), the unit ramp function is represented by

r(t) = 0 for t<0

= t for t>0