Chapter Exam

Chapter-14 Waves — Online MCQ Test

Q: Which of the following is an example of a transverse wave?

Answer: C. Light wave — In transverse waves, particle motion is perpendicular to the direction of wave propagation. Light waves are transverse electromagnetic waves.

Q: A tuning fork vibrating at 256 Hz is held near the end of a closed organ pipe. Beats are heard at 4 Hz. The frequency of the pipe could be:

Answer: C. Either 252 Hz or 260 Hz — Beat frequency = |f1 - f2|. If fbeat = 4 Hz and ftuning = 256 Hz, then fpipe = 256 ± 4, giving 252 Hz or 260 Hz.

Q: The wave equation for a progressive wave is v² = T/μ, where T is tension and μ is mass per unit length. If tension increases by a factor of 4 and mass per unit length decreases by a factor of 4, the wave speed increases by:

Answer: B. A factor of 4 — v ∝ √(T/μ). If T increases 4× and μ decreases 4×, then v ∝ √(4T × 4/μ) = √16 = 4 times the original speed.

PHYSICS · CLASS 11 FIRST PUC · Karnataka State Board

Practice Chapter-14 Waves with a free chapter-wise online MCQ test for Karnataka State Board CLASS 11 FIRST PUC PHYSICS. This chapter covers: Wave motion - Longitudinal waves - Transverse waves - Speed of travelling wave - Progressive wave - Principle of superposition - Reflection of waves - Standing waves - Fundamental.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter-14 Waves — Important Questions & Answers (FAQ)

Frequently asked questions from Karnataka State Board CLASS 11 FIRST PUC PHYSICS — Chapter-14 Waves, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is a wave?

A. A disturbance that travels through a medium transferring energy without transferring matter ✓
B. A visible oscillation of particles in a medium
C. A stationary pattern of vibration
D. A type of mechanical energy stored in elastic material

Answer: A. A disturbance that travels through a medium transferring energy without transferring matter
A wave is fundamentally a disturbance that propagates through space, transferring energy from one point to another without the actual transport of matter.

Which of the following is an example of a transverse wave?

A. Sound wave in air
B. Vibration of a tuning fork
C. Light wave ✓
D. Pressure wave in water

Answer: C. Light wave
In transverse waves, particle motion is perpendicular to the direction of wave propagation. Light waves are transverse electromagnetic waves.

What are standing waves?

A. Waves that do not propagate in a medium
B. Waves produced by superposition of two waves of the same frequency and amplitude traveling in opposite directions ✓
C. Waves that only exist in solids
D. Waves that have infinite wavelength

Answer: B. Waves produced by superposition of two waves of the same frequency and amplitude traveling in opposite directions
Standing waves (stationary waves) are formed when two progressive waves of equal frequency and amplitude traveling in opposite directions superpose.

A tuning fork vibrating at 256 Hz is held near the end of a closed organ pipe. Beats are heard at 4 Hz. The frequency of the pipe could be:

A. 250 Hz only
B. 260 Hz only
C. Either 252 Hz or 260 Hz ✓
D. Neither 252 Hz nor 260 Hz

Answer: C. Either 252 Hz or 260 Hz
Beat frequency = |f1 - f2|. If fbeat = 4 Hz and ftuning = 256 Hz, then fpipe = 256 ± 4, giving 252 Hz or 260 Hz.

The wave equation for a progressive wave is v² = T/μ, where T is tension and μ is mass per unit length. If tension increases by a factor of 4 and mass per unit length decreases by a factor of 4, the wave speed increases by: