A piano tuner tightens a string while sounding it with a 440 Hz fork. The beats slow from 4 Hz to 2 Hz. The string's frequency is now:

  1. 438 Hz or 442 Hz
  2. 444 Hz only
  3. 880 Hz
  4. exactly 440 Hz
Answer

A) 438 Hz or 442 Hz

Still 2 Hz from 440 Hz. SLO P-11-D-16 · Application

Physics MCQ · More Superposition, Stationary Waves and Beats MCQs · Practise