Q. The minimum phase difference between two simple harmonic oscillations, $y_{1} = \frac{1}{2}\sin{\omega t + \frac{\sqrt{3}}{2}\cos{\omega t}}$ $y_{2} = \sin{\omega t + \cos{\omega t}}$, is

A) $\frac{7\pi}{12}$
B) $\frac{\pi}{12}$
C) $- \frac{\pi}{6}$
D) $\frac{\pi}{6}$
Explanation

(b) Here, $y_{1} = \frac{1}{2}\sin{\omega t + \frac{\sqrt{3}}{2}\cos{\omega t}}$
= $\cos{\frac{\pi}{3}\sin{\omega t + \sin{\frac{\pi}{2}\cos{\omega t}}}}$
$\therefore$ $y_{1} = \sin\left( \omega t + \frac{\pi}{3} \right)$
Similarly, $y_{2} = \sqrt{2}\sin\left( \omega t + \frac{\pi}{4} \right)$
$\therefore$ Phase difference $\mathrm{\Delta}\varnothing = \frac{\pi}{3} - \frac{\pi}{4} = \frac{\pi}{12}$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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