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ICSE Class 10 Light and Sound — practice questions

Explore 50 free Light and Sound questions in ICSE Class 10 Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Light and Sound questions and exercises with answers

Showing questions 1–30 of 50.

Match the indicator test to its colour changeRead the answer and worked solution →An open-pipe resonator has a fundamental frequency of 120 Hz. What is the frequency of its third overtone?Read the answer and worked solution →For the same tone and listening conditions, greater amplitude makes sound?Read the answer and worked solution →Which unit is used to express a sound level?Read the answer and worked solution →A monotone has which pitch pattern?Read the answer and worked solution →Opening flute finger holes chiefly changes the effective?Read the answer and worked solution →A vibrating source completes 450 oscillations in 3 seconds. Frequency?Read the answer and worked solution →A 250 Hz source vibrates for 0.2 seconds. Complete oscillations?Read the answer and worked solution →Flute and guitar have 200 Hz fundamentals. Their fundamental pitches?Read the answer and worked solution →As a tone fades, its pitch stays fixed. It remains?Read the answer and worked solution →To test length's effect on string pitch, keep which properties fixed?Read the answer and worked solution →Frequency doubles; amplitude is unknown. What follows?Read the answer and worked solution →A vibrating source makes 8 vibrations each second. This sound isRead the answer and worked solution →A boy shouts and hears his echo after 2 s. Sound travels at 343 m/s. How far is the cliff?Read the answer and worked solution →Dolphins and bats find objects in the dark by usingRead the answer and worked solution →On a cold winter morning compared with a hot afternoon, sound in air travelsRead the answer and worked solution →As a sound wave passes through air, what do the air particles do?Read the answer and worked solution →Match each wave parameter with its definition and symbol:Read the answer and worked solution →Match each sound wave phenomenon with its manifestation:Read the answer and worked solution →Match each ultrasound application with its field:Read the answer and worked solution →Match each anatomical region of the human ear with its acoustic role:Read the answer and worked solution →Match each indicator to its resultRead the answer and worked solution →Which of the following is used for dissolution of gold?Read the answer and worked solution →Sodium carbonate is a basic salt because it is a salt ofRead the answer and worked solution →True or false: acids and basesRead the answer and worked solution →Match each organic functional group with its IUPAC suffix and formula:Read the answer and worked solution →Match each soap and detergent feature with its cleansing mechanism:Read the answer and worked solution →Structural formula of ethyne isRead the answer and worked solution →Vinegar is a solution ofRead the answer and worked solution →Buckminsterfullerene is an allotropic form ofRead the answer and worked solution →

Worked practice questions

Match the indicator test to its colour change

Read exercise and reference answers
Matching pairs
  1. Left
    Blue litmus in acid
    Right
    Turns red
  2. Left
    Red litmus in base
    Right
    Turns blue
  3. Left
    Phenolphthalein in base
    Right
    Turns pink

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An open-pipe resonator has a fundamental frequency of 120 Hz. What is the frequency of its third overtone?

  1. 480 Hz
  2. 360 Hz
  3. 600 Hz
  4. 840 Hz
Show answer and solution

Correct answer: A. 480 Hz

1. For an open-pipe resonator, the resonant frequencies are f_n = n x v / (2L), where f1 is the fundamental, f2 is the first overtone, f3 is the second overtone, and f4 is the third overtone. 2. Since f1 = v / (2L) = 120 Hz, the third overtone corresponds to n = 4, so f4 = 4 x f1. 3. Substitute: f4 = 4 x 120 Hz = 480 Hz, matching option A. 4. Option B, 360 Hz, would instead result from using n = 3, which is the second overtone, not the third. _Source: OpenStax Physics (CC BY 4.0), Ch 14 "Sound", section Open-Pipe and Closed-Pipe Resonators_

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For the same tone and listening conditions, greater amplitude makes sound?

  1. Lower pitched
  2. Higher pitched
  3. Lower in frequency
  4. Louder to hear
Show answer and solution

Correct answer: D. Louder to hear

Increasing vibration amplitude increases loudness when the note and listening conditions are kept the same.

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More Physics topics

Ray Optics and Optical InstrumentsForce and MachinesWork, Energy and PowerElectricity: Current and Household CircuitsHeat: calorimetry, specific heat capacity and latent heatModern Physics: radioactivity, nuclear fission and fusionSound: echoes, natural vibrations, loudness pitch and qualityCalorimetry