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MATCH THE COLUMN
Source has frequency \( f \). Source and observe both have same speed. For the apparent frequency observed by observer match the following
\begin{tabular}{|l|l|l|l|}
\hline \multicolumn{2}{|c|}{ Column-I } & \multicolumn{2}{|c|}{ Column-II } \\
\hline A. & \( \begin{array}{l}\text { Observer is approaching the } \\
\text { source but source is receding } \\
\text { from the observer }\end{array} \) & More than \( \mathrm{f} \) \\
\hline B. & \( \begin{array}{l}\text { Observer and source both } \\
\text { approaching towards each other }\end{array} \) & q. & Less than \( \mathrm{f} \) \\
\hline C. & \( \begin{array}{l}\text { Observer and source both } \\
\text { receding from each other }\end{array} \) & r. & Equal to f \\
\hline D. & \( \begin{array}{l}\text { Source is approaching but } \\
\text { observer is receding }\end{array} \) & s. & Infinite \\
\hline
\end{tabular}
(1) A-(r); B-(s); C-(p); D-(q)
(2) A-(q); B-(p); C-(r); D-(s)
(3) A-(r); B-(p); C-(s); D-(q)
(4) A-(r); B-(p); C-(q); D-(r)
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