Question

Two sinusoidal voltage signals of equal frequency are applied to the vertical and horizontal deflection plates of a CRO. The output observed on the screen is shown in the following figure. The phase difference between applied signal is

• A. ${42.19}^o$
• B. ${53.13}^o$
• C. ${36.86}^o$
• D. ${126.87}^o$

Answer 1

The correct option is D ${126.87}^o$

$Sinceellipseisinsecondandfourthquadrants,sovalidvalueofphaseangle=180°-\varphi$

Where,

$\varphi =si{n}^{-1}\left(\frac{4}{5}\right)={53.13}^o$

$Phaseangle={180}^o-{53.13}^o={126.87}^o$