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Consider the following statements with regard to Lissajous pattern on a CRO : 

1. It is a stationary pattern on the CRO. 

2. It is used for precise measurement of frequency of a voltage signal. 

3. The ratio between frequencies of vertical and longitudinal voltage signals should be an integer to have a steady Lissajous pattern. 

Which of the above statements is/are correct ? 

(a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3

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Consider the following statements with regard to Lissajous pattern on a CRO : 

1. It is a stationary pattern on the CRO. 

2. It is used for precise measurement of frequency of a voltage signal. 

3. The ratio between frequencies of vertical and longitudinal voltage signals should be an integer to have a steady Lissajous pattern. 

Which of the above statements is/are correct ? 

(a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3

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