Question

The Lissajous pattern observed on screen of CRO is a straight line inclined at 45° to x-axis. If the x-plate input is $2\sin \omega t.$ The y-Plate input is

• A. $2\sin \omega t$
• B. $2\sin (\omega t+90°)$
• C. $2\sin (\omega t+45°)$
• D. $2\sin (\omega t+120°)$

Answer 1

The correct option is A $2\sin \omega t$

When signals to x and y Plates are in phase, the display is a straight line inclined at 45°.