Question

Phase difference between two signals is commonly measured using

• A. Lissajous figures
• B. Voltmeter
• C. Wattmeter
• D. Multimeter

Hint:

Lissajous figures displayed on a CRO are used to determine \[ \boxed{ \text{Phase difference and frequency ratio between two sinusoidal signals.} } \]

Answer 1

The Correct Option is A

Step 1: Recall the use of Lissajous figures. When two sinusoidal signals are applied to the \(X\)- and \(Y\)-inputs of a CRO, characteristic patterns called Lissajous figures are formed.

Step 2: Identify their application. The shape of the Lissajous figure depends on the phase difference between the two signals. Hence, \[ \boxed{\text{Lissajous figures}} \] are commonly used to measure phase difference. Therefore, \[ \boxed{(A)} \] is the correct answer.