WAVE

A pendulum is oscillating with amplitude 2cm and frequency 1.5Hz. Which of the following graphs correctly shows the displacement of the pendulum bob against time?

Which of the following quantities will decrease when an oscillating system undergoes damped oscillation?

• Speed

• Amplitude

• Frequency

• Wave length

Damping of an oscillating system is due to

• the system is losing energy to the surrounding.

• the system has been set up wrongly.

• the system is not oscillating in vacuum

A force oscillation is

• A system oscillates with maximum amplitude.

• A system oscillates with decreasing amplitude.

• A system oscillates with the help of an external force.

• A system oscillates without any external force act on it.

When an oscillating spring reaches resonance state, it

• Stop oscillates.

• Experiencing damped oscillation.

• Oscillates with maximum amplitude.

• Oscillates with higher frequency.

The natural frequency of a spring is f Herz. Resonance happens if the frequency of the external force that applied on it is

• 0.5f Hz

• f Hz

• 2f Hz

• 4f Hz

A thin piece of glass is broken when a soprano is singing with a high pitch. This probably is caused by a physics phenomena called

• Diffraction

• Interference

• Damping

• Resonance

It is observed that a car will vibrate intensely at a particular speed. This is probably due to

• Inertia

• Resonance

• Damping

• Diffraction

A water wave is produced from a source of frequency 25 Hz. If the wavelength is 0.8 cm, what is the velocity of propagation of the water wave?

• 0.2m

• 20m

• 31.25m

• 3.125m

Which of the following quantities will cause the amplitude of a wave changes?

• Type of the wave

• Energy of the wave

• Wavelength of the wave

• Frequency of the wave

The wavelength of a propagating wave is not affected by

• the frequency of the wave

• the velocity of the wave

• the energy of the wave

• the medium of wave that propagates

The main difference between transverse wave and longitudinal wave is

• The wave pattern

• The direction of the vibration of the particles in the wave

• Transverse wave propagates faster than longitudinal wave.

• Transverse wave can travels in vacuum while longitudinal wave cannot

Which of the following waves is longitudinal wave?

• Microwave

• Light wave

• Sound wave

• Radio wave

In a ripple tank experiment, waves are produced at the RATE of 24 waves per second and the distance between 5 successive ripples is 20cm. The experiment is repeated by changing the frequency of the vibrator, and the new distance between 5 successive ripples is 12cm. What is the new frequency of the vibrator?

• 100Hz

• 60Hz

• 20Hz

• 40Hz

The end coil of a slinky spring is connected to a motor which is moving forward and backward at a frequency of 4Hz. Given that the distance between four successive rarefactions is 60cm. What is the speed of the speed of wave produced?

• 2.4 ms-1

• 0.8 ms-1

• 2.5 ms-1

• 1.0 ms-1

A sound wave of wavelength 4mm travels in air at a frequency of 6.0 × 104 Hz. Find the time take by the wave to travel 60m

• 1 s

• 0.5 s

• 0.25 s

• 0.8 s