Question

What is the general expression of a sinusoidal signal?

(a) A(t) = Am  sin⁡(ωt – Φ)

(b) A(t) = sin⁡(ωt + Φ)

(c) A(t) = Am  sin⁡(ωt + Φ)

(d) A(t) = 2Am  sin⁡(ωt + Φ)

I got this question in class test.

I need to ask this question from Representation of AC Current and Voltage by Rotating Vectors in section Alternating Current of Physics – Class 12

Answer 1

The correct answer is (c) A(t) = Am  sin⁡(ωt + Φ)

The explanation: A sinusoidal signal is a mathematical curve that describes a smooth periodic oscillation. The general expression of a sinusoidal signal is given as follows:

A(t) = Am  sin⁡(ωt + Φ)

Where  ➔ Am = Peak Amplitude, ω = Angular Frequency, Φ = Phase Shift.