JEE Main & Advanced Sample Paper JEE Main Sample Paper-40

  • question_answer
    Statement 1: A person is standing near a railway track. A train is moving on the track. As train is approaching the person, apparent frequency keeps on increasing and when train has passed the person then apparent frequency keeps on decreasing.
    Statement 2: When train is approaching the person then \[f={{f}_{0}}\left [ \frac{c}{c-u} \right]\]and when tram is moving away from the person \[f={{f}_{0}}\left[ \frac{c}{c+u} \right],c\]is velocity of sound, u is velocity of train and \[{{f}_{0}}\] is original frequency of whistle.

    A) Statement-1 is true, Statement-2 is true; Statement-2 is a correct explanation for Statement-1.

    B) Statement-1 is true, Statement-2 is true; Statement-2 is not a correct explanation for Statement-1.

    C) Statement-1 is true, Statement-2 is false.

    D) Statement-1 is false, Statement-2 is true.

    Correct Answer: D

    Solution :

    Statement-2 is correct and statement-1 is false.


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