Question

A voltage pulse of amplitude 10V begins at 5 sec and lasts for 20 msec,which is short compared with the response times and time constants of the system.This impulse is then passed through an integrator.Determine an expression for the output voltage e(t) of the intergrator.
1) 0.2 u(t-5)
2) 0.2 u
3) 5t^2 u(t)
4) 50 u(t-0.02)