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Measurements and Instrumentation

Q1: The Lissajous pattern observed on screen of CRO is a straight line inclined at 45° to x axis. If X-plate input is 2 sin ωt, the Y-plate input is

A 2 sin ωt

B 2 sin (ωt + 45°)

C 2 sin (ωt - 45°)

D
22 sin ωt + 45°)

ANS:A - 2 sin ωt

When signals to X and Y plates are in phase, the display is a straight line inclined at 45°.



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