Signal Operations-1

The CT Signal u(t-5)=0 if------------

• t>5

• t=5

• t<5

• t=0

Signal operation in time domain-Hierarchy

• Reversal, Shifting, Scaling

• Scaling, Reversal, Shifting

• Scaling, Shifting, Reversal

• Shifting, Scaling, Reversal

Which signal amplitude is equal to one for t>=0?

• Step signal

• Ramp Signal

• Impulse Signal

• Sinusoidal Signa;

Identify the signal having an amplitude zero except t=0

• Impulse Signal

• Step Signal

• Ramp Signal

• Sinusoidal Signal

If the signal u(t) is shifted to u(t+3), then the unit step signal is

• delayed by 3 units

• advanced by 3 units

• No change

• Amplitude increase by 3 unit

If x(t/2) is performed for a signal x(t), then the signal is

• expanded

• compressed

• No change

• increase in amplitude

If b>1 which of the following statement is true for y(t)= x(t/b)

• y(t) is a time-compressed version of x(t), compressed by a factor b.

• y(t) is a time-expanded version of x(t), expanded by a factor b.

• y(t) is a time inverted version of x(t) scaled by |b|.

If we shift a discrete-time impulse function by a shifting value of 0.6 then

• Discrete-time impulse function will be scaled by 0.6 value.

• Discrete-time impulse function will not shift for any float value.

• Discrete-time impulse function will shift with 0.6 value in the time axis.

Real exponential signal is defined as x(t) =A.exp(at). If the value of 'a' is negative, then the signal will be?

• A DC signal.

• Exponentially growing signal.

• Exponentially decaying signal.

• A sinusoidal signal.

Real exponential signal is defined as x(t) = A.exp(at). If the value of 'a' is zero, then the signal will be

• A DC signal with amplitude 'A'.

• Exponentially growing signal.

• Exponentially decaying signal.

• A sinusoidal signal with amplitude 'A'.