S&S-Demo quiz

Telegraph Signals are examples of

• Digital Signals

• Analog Signals

• Impulse signals

• Pulse Train

The signal which is defined only at origin i.e only at t=0 is

• unit step signal

• impulse signal

• exponential signal

• ramp signal

The time range of the signal [u(t+1)-u(t-5)] is

• -1 to 5

• -1 to 4

• -5 to 1

• -5 to -1

1. All continuous time sine,cosine and exponential signals are always periodic
2. All Discrete time sine,cosine and exponential signals are always periodic

• Both statements are correct

• Both statements are wrong

• statement 1 is correct, statement 2 is wrong

• statement 1 is wrong, statement 1 is correct

The signal defined by x(t)= x(-t) is

• Periodic

• aperiodic

• even

• odd

A signal defined by x(t+T) = x(t) is said to be

• Even signal

• Power signal

• Periodic signal

• aperoidic signal

A signal is said to be power signal if its power is

• zero

• one

• finite

• infinite

A signal is said to be energy energy if its energy is

• zero

• one

• finite

• infinite

Most periodic signals are

• Even signals

• Energy signals

• Power signals

• asymmetric signals

which of the following is an operation on dependent variable

a. Amplitude scaling

b. Addition

c. Differentiation

d. time scaling

• a, b, c, d

• a, b, c

• a, b

• a