beat and properties of sound questions with solutions

Showing 1–10 of 34 questions

• NumericmediumWave Motionbeat and properties of sound

  Tuning fork A has frequency 512 Hz. Tuning fork B produces 9 beats per second with A. Fork B is filed so that its frequency increases by exactly 12 Hz, and the new beat frequency is 3 beats per second. If the original frequency of fork B is N Hz, find N.

  Your answer

  Check answerShow answer

  JEE MainsNEETJEE Advanced

  Open question & full solution →
• A/ReasyWave Motionbeat and properties of sound

  Choose the correct option for the following Assertion (A) and Reason (R).

  Assertion

  For a point sound source of fixed acoustic power, moving a listener from distance r to r/2 increases the sound-intensity level by about 6 dB.

  Reason

  Sound intensity varies as 1/r², so halving the distance multiplies intensity by 4 and 10log₁₀4 ≈ 6.02 dB.

  Options

  • Option A

    Both A and R are true and R is the correct explanation of A.

  • Option B

    Both A and R are true but R is NOT the correct explanation of A.

  • Option C

    A is true but R is false.

  • Option D

    A is false but R is true.

  Check answerShow answer

  JEE MainsNEETJEE Advanced

  Open question & full solution →
• NumericeasyWave Motionbeat and properties of sound

  The sound-intensity level at one point exceeds that at another point by 30 dB. If the ratio of the larger intensity to the smaller intensity is N, find N.

  Your answer

  Check answerShow answer

  JEE MainsNEETJEE Advanced

  Open question & full solution →
• NumericmediumWave Motionbeat and properties of sound

  Three equal-amplitude tones of frequencies 499 Hz, 500 Hz and 501 Hz are started in phase. Their resultant can be written in the form A[1+2cos(2πNt)]cos(2π500t). Find N.

  Your answer

  Check answerShow answer

  JEE MainsNEETJEE Advanced

  Open question & full solution →
• MCQmediumWave Motionbeat and properties of sound

  Tuning fork A has frequency 256 Hz. Tuning fork B produces 8 beats per second with A. Fork B is then filed slightly, increasing its frequency, and the beat frequency becomes 3 beats per second. What was the original frequency of fork B?

  Options

  • Option A

    248 Hz

  • Option B

    253 Hz

  • Option C

    259 Hz

  • Option D

    264 Hz

  Check answerShow answer

  JEE MainsNEETJEE Advanced

  Open question & full solution →
• NumericmediumWave Motionbeat and properties of sound

  A sonometer wire produces 20 beats per second with a 300 Hz tuning fork. The tension in the wire is then increased by 44%, while its vibrating length and linear density remain unchanged, and the beat frequency becomes 36 beats per second. If the original string frequency is N Hz, find N.

  Your answer

  Check answerShow answer

  JEE MainsNEETJEE Advanced

  Open question & full solution →
• MCQmediumWave Motionbeat and properties of sound

  Three equal-amplitude sound sources start in phase and have frequencies f-Δf, f and f+Δf. Which expression correctly gives the resultant displacement?

  Options

  • Option A

    y = A[1+2cos(2πΔf t)] cos(2πft)

  • Option B

    y = 3A cos(2πΔf t)

  • Option C

    y = 2A cos(πΔf t) cos(2πft)

  • Option D

    y = A cos[2π(f+Δf)t]

  Check answerShow answer

  JEE MainsNEETJEE Advanced

  Open question & full solution →
• NumericmediumWave Motionbeat and properties of sound

  A tuning fork resonates with the fundamental mode of a sonometer wire when the wire tension is 16 N. The tension is increased to 36 N while length and linear density remain unchanged, and the wire then gives 90 beats per second with the same fork. If the tuning-fork frequency is N Hz, find N.

  Your answer

  Check answerShow answer

  JEE MainsNEETJEE Advanced

  Open question & full solution →
• NumericmediumWave Motionbeat and properties of sound

  An unknown tuning fork gives 5 beats per second with a 340 Hz standard fork. After the unknown fork is filed, its frequency increases and the beat frequency falls to 2 beats per second. If the original frequency of the unknown fork is N Hz, find N.

  Your answer

  Check answerShow answer

  JEE MainsNEETJEE Advanced

  Open question & full solution →
• MCQeasyWave Motionbeat and properties of sound

  Two musical instruments produce sounds having the same fundamental frequency. At a listener, one sound has much greater intensity and the two sounds have different harmonic contents. Which statement correctly compares their pitch, loudness and quality?

  Options

  • Option A

    Same pitch, same loudness and same quality

  • Option B

    Same pitch, different loudness and different quality

  • Option C

    Different pitch but the same quality

  • Option D

    Same loudness because the fundamental frequency is the same

  Check answerShow answer

  JEE MainsNEETJEE Advanced

  Open question & full solution →