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The signal x(t) = A cos(ωt + φ) is
- a)an energy signal
- b)a power signal
- c)an energy as well as a power signal
- d)neither an energy nor a power signal
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
The signal x(t) = A cos(ωt+ φ) isa)an energy signalb)a power...
All bounded periodic signals are power signals, because they do not converge to a finite value so their energy is infinite and their power is finite.
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The signal x(t) = A cos(ωt+ φ) isa)an energy signalb)a power...
Ωt + φ) represents a sinusoidal wave with amplitude A, angular frequency ω, and phase shift φ. The cosine function is used because it starts at a maximum value and moves downward through zero before returning to the maximum value again, which is a convenient way of describing many physical phenomena that oscillate back and forth, such as sound waves or electromagnetic waves. The phase shift φ determines the starting point of the wave. If the phase shift is 0, the wave starts at its maximum value; if the phase shift is π/2, the wave starts at zero; and if the phase shift is π, the wave starts at its minimum value. The angular frequency ω determines how quickly the wave oscillates, with higher values of ω corresponding to faster oscillations. The frequency f of the wave is related to the angular frequency by f = ω/2π.
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