A. Less than the frequency of the sound produced by the source
B. Greater than the frequency of the sound produced by the source
C. Same as that produced by the source
D. Zero
Free MCQs for FPSC, NTS, PPSC, PMS, CSS & All Pakistan Exams 2026
A. Less than the frequency of the sound produced by the source
B. Greater than the frequency of the sound produced by the source
C. Same as that produced by the source
D. Zero