A. An apparent increase in frequency (or pitch)
B. An apparent decrease in frequency (or pitch)
C. An apparent decrease in wavelength
D. No apparent change in the frequency
Free MCQs for FPSC, NTS, PPSC, PMS, CSS & All Pakistan Exams 2026
A. An apparent increase in frequency (or pitch)
B. An apparent decrease in frequency (or pitch)
C. An apparent decrease in wavelength
D. No apparent change in the frequency