What are A.C. signals? | vedclass

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(N/A) An $A.C.$ (Alternating Current) signal is an electric current or voltage that periodically reverses its direction and changes its magnitude cont

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(N/A) An $A.C.$ (Alternating Current) signal is an electric current or voltage that periodically reverses its direction and changes its magnitude continuously with time.
Unlike $D.C.$ (Direct Current),which flows in a single direction,$A.C.$ follows a sinusoidal waveform in most power applications.
The mathematical expression for an $A.C.$ voltage is typically given by $V(t) = V_m \sin(\omega t + \phi)$,where $V_m$ is the peak voltage,$\omega$ is the angular frequency,and $\phi$ is the phase constant.
$A.C.$ is widely used for power distribution because its voltage can be easily stepped up or down using transformers.

$(A) \ x_0 \sin \omega t$	$(i) \ x_0$
$(B) \ x_0 \sin \omega t \cos \omega t$	$(ii) \ \frac{x_0}{\sqrt{2}}$
$(C) \ x_0 \sin \omega t + x_0 \cos \omega t$	$(iii) \ \frac{x_0}{2 \sqrt{2}}$

What are $A.C.$ signals?

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