Multiple choice

Consider the following statements:

  1. Sometimes a curved sound board may be placed behind the stage of an auditorium for the absorption of sound waves.
  2. Human heart produces 'lub' sound during contraction of heart.

Which of the given statements is/are true?

  1. Only (1)

  2. Only (2)

  3. Both (1) & (2)

  4. Neither (1) nor (2)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Statement (1) is wrong. The curved sound board is placed behind the stage of an auditorium so that the sound after reflecting from the sound board spreads evenly across the width of the auditorium. Statement (2) is correct. Human heart produces 'lub dub' sound with contraction and relaxation of heart, respectively.

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