PhysicsQuiz2

If the speed of sound in air is 340 ms ⁻¹, the frequency of the fundamental note of an organ pipe 65 cm long, closed at one end is

• 87 Hz
• 175 Hz
• 65 Hz
• 131 Hz

In a resonance tube experiment performed with a vibrating tuning fork of frequency 450 Hz, the length of air column at first resonance is 60 cm. The velocity of sound in air is

• 135 ms⁻¹
• 540 ms⁻¹
• 270 ms⁻¹
• 1080 ms⁻¹

An organ pipe open at both ends has a fundamental frequency of 600 Hz. The frequency of the third overtone is

• 900 Hz
• 1200 Hz
• 1800 Hz
• 2400 Hz

A stationary wave pattern is formed by a wave of frequency 25 Hz and velocity 75 cms⁻¹. The distance between adjacent nodes is

• 0.5 cm
• 1 cm
• 3 cm
• 1.5 cm

Transverse stationary waves of frequency 120 Hz are generated in a long, thin wire. If the distance between successive nodes on the wire is 25 cm, the speed of the waves is

• 240 ms⁻¹
• 120 ms⁻¹
• 30 ms⁻¹
• 60 ms⁻¹

A progressive wave of frequency 30 Hz and speed 180 cms ⁻¹ is reflected upon itself such that a stationary wave is formed. The distance between a node and an adjacent antinode is

• 12 cm
• 3 cm
• 6 cm
• 1.5 cm

A wavelength of a waveform can be defined as the distance between

• a node and an adjacent antinode
• successive nodes
• two successive points that are out of phase by π
• two successive points that are exactly in phase

Which of the following is true of a stick made to oscillate up and down in the middle of a pool of water?

• Longitudinal waves are set up in the water
• Water particles move outwards from the centre of the disturbance
• The wave velocity is the distance covered by a water particle in one second
• Water particles move vertically up and down but not sideways

The following are examples of transverse waves EXCEPT

• Ripples on water
• X‐rays
• Stationary waves in a vibrating string
• Stationary waves in a resonance tube

Which of the following is not a characteristic of a stationary wave?

• The distance between a node and an adjacent antinode is equal to one quarter of the wavelength
• The node is always stationary while the antinode is a point of maximum displacement
• It is formed when a wave traveling in a medium is reflected normally upon itself
• It is formed whenever two waves traveling in opposite directions interfere in a medium