If the unit step response of a network is \(\left( {1 - {e^{ - \alpha t}}} \right)\), then its unit impulse response will be

\(\alpha {e^{ - \frac{1}{\alpha }t}}\)

\(\frac{1}{\alpha }{e^{ - \alpha t}}\)

\(\left( {1 - \alpha } \right){e^{ - \alpha t}}\)

If the unit step response of a network is \(\left( {1 - {e^{ - \alpha

1.	If the unit step response of a network is \(\left( {1 - {e^{ - \alpha t}}} \right)\), then its unit impulse response will be
A.	\(\alpha {e^{ - \alpha t}}\)
B.	\(\alpha {e^{ - \frac{1}{\alpha }t}}\)
C.	\(\frac{1}{\alpha }{e^{ - \alpha t}}\)
D.	\(\left( {1 - \alpha } \right){e^{ - \alpha t}}\)
Answer» B. \(\alpha {e^{ - \frac{1}{\alpha }t}}\)