MERIT YARD

Class 11th Physics - Waves - MERIT YARD

Question 1 / 40Sound waves in air are:

A) Longitudinal

B) Transverse

C) Electromagnetic

D) Non-mechanical

Question 2 / 40Newton assumed that sound travels in air under _______ conditions.

A) Isothermal

B) Adiabatic

C) Isobaric

D) Isochoric

Question 3 / 40The correction in Newton's formula for the speed of sound was given by:

A) Einstein

B) Maxwell

C) Bernoulli

D) Laplace

Question 4 / 40With increase in humidity, the speed of sound:

A) Increases

B) Decreases

C) Remains same

D) Becomes zero

Question 5 / 40Transverse waves can travel through:

A) Solids only

B) Liquids only

C) Gases only

D) Vacuum

Question 6 / 40The distance between two consecutive nodes in a stationary wave is:

A) λ

B) λ/2

C) λ/4

D) λ/2 (Corrected)

Question 7 / 40Beats are the result of:

A) Interference

B) Diffraction

C) Polarization

D) Reflection

Question 8 / 40The speed of sound in air is independent of:

A) Temperature

B) Pressure

C) Humidity

D) Density

Question 9 / 40If two waves of frequencies 256 Hz and 260 Hz are sounded together, the beat frequency is:

A) 516 Hz

B) 2 Hz

C) 4 Hz

D) 258 Hz

Question 10 / 40Doppler Effect is applicable for:

A) Sound only

B) Light only

C) Both Sound and Light

D) None

Question 11 / 40Which of the following properties distinguishes transverse waves from longitudinal waves?

A) Interference

B) Diffraction

C) Polarization

D) Reflection

Question 12 / 40An open organ pipe has:

A) All harmonics

B) Only odd harmonics

C) Only even harmonics

D) No harmonics

Question 13 / 40A closed organ pipe has:

A) All harmonics

B) Only odd harmonics

C) Only even harmonics

D) Infinite frequencies

Question 14 / 40The speed of sound in a gas is proportional to:

A) T

B) √T

C) T²

D) 1/T

Question 15 / 40When a wave travels from one medium to another, which property remains constant?

A) Wavelength

B) Speed

C) Frequency

D) Amplitude

Question 16 / 40The relation between frequency (ν), wavelength (λ) and velocity (v) is:

A) v = νλ

B) v = ν/λ

C) ν = vλ

D) λ = vν

Question 17 / 40The fundamental frequency of a closed pipe of length L is:

A) v / 2L

B) v / 4L

C) 2v / L

D) v / L

Question 18 / 40In stationary waves, particles at nodes have:

A) Maximum displacement

B) Zero displacement

C) Maximum velocity

D) Infinite energy

Question 19 / 40Human ear can hear sound in the frequency range:

A) 0 to 20 Hz

B) 20 Hz to 20,000 Hz

C) Above 20,000 Hz

D) 10 to 100 Hz

Question 20 / 40Velocity of sound in vacuum is:

A) 332 m/s

B) 3 x 10⁸ m/s

C) Zero

D) Infinite

Question 21 / 40The intensity of a wave is proportional to the square of its:

A) Amplitude

B) Wavelength

C) Frequency

D) Distance

Question 22 / 40Sound travels fastest in:

A) Air

B) Water

C) Steel (Solids)

D) Vacuum

Question 23 / 40The phase difference between two points at a distance λ/4 is:

A) π

B) π/2

C) 2π

D) π/4

Question 24 / 40Ultrasonic waves have frequency:

A) Less than 20 Hz

B) Between 20 and 20,000 Hz

C) More than 20,000 Hz

D) Equal to light frequency

Question 25 / 40If a source moves towards a stationary observer, the apparent frequency:

A) Increases

B) Decreases

C) Remains same

D) Becomes zero

Question 26 / 40In a transverse wave, the particles of the medium vibrate:

A) Along the direction of wave

B) Perpendicular to wave direction

C) In circles

D) Do not vibrate

Question 27 / 40The velocity of sound in air at 0°C is approximately:

A) 300 m/s

B) 332 m/s

C) 3 x 10⁸ m/s

D) 1500 m/s

Question 28 / 40In stationary waves, the points of maximum displacement are:

A) Nodes

B) Anti-nodes

C) Amplitude

D) Crests

Question 29 / 40The pitch of a sound depends upon its:

A) Frequency

B) Amplitude

C) Velocity

D) Quality

Question 30 / 40The Doppler effect for light is used by astronomers to find:

A) Temperature of stars

B) Mass of stars

C) Velocity of stars

D) Age of stars

Question 31 / 40Laplace corrected Newton's formula by assuming the process to be:

A) Isothermal

B) Adiabatic

C) Isobaric

D) Rapid expansion

Question 32 / 40What is the speed of sound in a steel rod? (Given Y = 2 x 10¹¹ Pa, density = 8000 kg/m³)

A) 332 m/s

B) 5000 m/s

C) 1500 m/s

D) 250 m/s

Question 33 / 40Equation of a progressive wave is y = A sin(ωt - kx). Here 'k' is:

A) Spring constant

B) Propagation constant (2π/λ)

C) Boltzmann constant

D) Kinetic energy

Question 34 / 40Shock waves are produced by:

A) Subsonic speeds

B) Supersonic speeds (v > v_sound)

C) Light waves

D) Stationary sources

Question 35 / 40Tuning forks are used to:

A) Generate light

B) Produce sound of fixed frequency

C) Measure pressure

D) Heat the air

Question 36 / 40Ratio of fundamental frequencies of an open and closed pipe of same length is:

A) 1:1

B) 2:1

C) 1:2

D) 4:1

Question 37 / 40If tension in a string is increased 4 times, the velocity of wave becomes:

A) 4 times

B) 2 times

C) Half

D) 16 times

Question 38 / 40The number of beats heard per second is equal to:

A) Difference in frequencies

B) Sum of frequencies

C) Product of frequencies

D) Average frequency

Question 39 / 40Quality of sound depends on:

A) Pitch

B) Loudness

C) Waveform (Overtones)

D) Distance

Question 40 / 40Echo is produced due to:

A) Refraction

B) Reflection of sound

C) Interference

D) Doppler effect

🚀 Join Merit Yard for JAC 2026 Physics Success! 🚀