U1 Quiz 3

What is the difference between an energy signal and a power signal?

• The difference is in the color of the signal

• The difference between an energy signal and a power signal lies in the nature of their energy or power characteristics.

• Power signals are used for communication while energy signals are not

• Energy signals are louder than power signals

Can a signal be both an energy signal and a power signal at the same time?

• Maybe

• Sometimes

• No

• Yes

Give an example of an energy signal.

• x(t) = e^(-t) for t < 0

• x(t) = sin(t)

• x(t) = e^(-t) for t >= 0

• x(t) = cos(t)

Give an example of a power signal.

• Sinusoidal signal with finite amplitude and frequency

• Square wave signal with infinite amplitude and frequency

• Sawtooth signal with infinite amplitude and frequency

• Triangular signal with finite amplitude and frequency

How is the energy of a signal calculated?

• Energy = ∫|x(t)|^3 dt

• Energy = ∫|x(t)|^2 dx

• Energy = ∫|x(t)|^2 dt

• Energy = ∫|x(t)| dt

How is the power of a signal calculated?

• Divide the signal values by the average power

• Multiply the signal values by a constant factor

• Take the square root of the signal values

• Square the signal values and then average them over time.

What are the properties of an energy signal?

• Infinite energy, integral of squared magnitude is infinite, spread out in time, non-zero average value

• Finite energy, integral of squared magnitude is finite, localized in time, zero average value

• Finite energy, integral of squared magnitude is finite, spread out in time, zero average value

• Finite energy, integral of squared magnitude is infinite, localized in time, zero average value

What are the properties of a power signal?

• Variable power

• Finite power

• Constant power

• Infinite power

Explain the concept of time-averaged power of a signal.

• The time-averaged power is the peak power of the signal

• The time-averaged power of a signal is the average of the squared magnitude of the signal over a specified time interval.

• Time-averaged power is calculated by dividing the signal's amplitude by its frequency

• Time-averaged power is the sum of the signal's amplitude over a specified time interval

Discuss the significance of energy and power signals in signal processing.

• Power signals have finite energy over a finite interval.

• Energy signals have infinite energy over a finite interval.

• Energy signals have finite energy over a finite interval, while power signals have finite power over an infinite interval.

• Energy signals have finite power over an infinite interval.