Waves

Written by Dr. Hamza Farooq (Physics)

Class 11 · Physics · 8 questions

Name: ____________________ Date: ____________

The speed of a wave of frequency 100 Hz and wavelength 3.4 m is:
- A 340 m/s
- B 3.4 m/s
- C 34 m/s
- D 103.4 m/s
The beat frequency of two sources of 256 Hz and 260 Hz is:
- A 2 Hz
- B 4 Hz
- C 258 Hz
- D 516 Hz
In a stationary wave the points of zero amplitude are:
- A Wavefronts
- B Nodes
- C Crests
- D Antinodes
The Doppler effect is a change in the observed:
- A Mass
- B Amplitude only
- C Frequency due to relative motion
- D Speed of light
The fundamental frequency of a string of length L and wave speed v fixed at both ends is:
- A 2 v / L
- B v / 2L
- C v / L
- D v L
The speed of a wave on a stretched string increases when the tension:
- A Increases
- B Is zero
- C Decreases
- D Is constant
Sound is a:
- A Transverse wave only
- B Electromagnetic wave
- C Surface wave only
- D Longitudinal wave
Constructive interference occurs when two waves meet:
- A In phase
- B At right angles
- C At different speeds
- D Out of phase by 180 degrees

Answer key

1. A, 2. B, 3. B, 4. C, 5. B, 6. A, 7. D, 8. A