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PPSC Physics Chapter 5 Waves and Wave Properties of Light MCQs With Answers
Question # 1
The ripple tank is used to study various features of
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Wave phenomenon
Interferences
Doppler's effect
Reverberation
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Question # 2
Stationary waves only a discrete set of frequencies are set up in a medium. This fact is called.
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Harmonics
Overtones
Quantization of frequencies
Superposition of frequencies
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Question # 3
Which of the title for combining of notes that produce jarring effect on the ear.
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Noise
Melody
Harmony
Discord
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Question # 4
On which parameter the path difference between two interfering waves depends upon.
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Amplitude
Pitch
Intensity
Phase angle
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Question # 5
X-rays can cause
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Malaria
Dysentery
Cancer
Blood pressure
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Question # 6
When stationary waves are formed in a closed organ pipe.
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A node is formed at the closed end of the pipe
An antinode is formed at the closed end of the pipe
Each particle at the node experience zero acceleration
The maximum pressure occurs at the nodes
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Question # 7
We get light inside a room in a day time due to
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Interferences
Polarization
Diffraction
Refraction
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Question # 8
Waves that have the same direction of vibration as their direction of travel are.
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Longitudinal waves
Transverse wave
Standing waves
hair wave
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Question # 9
Light wave are
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Longitudinal
Transverse
Sometimes longitudinal and sometimes transverse
Neither longitudinal nor transverse
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Question # 10
In a stationary wave the particle velocity at the node is
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Zero
Constant
Minimum
Maximum
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Question # 11
On reflection of light from a source there occurs a change in
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Wavelength
Velocity
Period
Frequency
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Question # 12
In vacuum all electromagnetic waves have the same.
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Frequency
Amplitude
Speed
Wavelength
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Question # 13
Beats occur due to
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Reflection
Refraction
interference
Diffraction
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Question # 14
A bat while flying determines the location and nature of object in his way by sending.
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Infrasonic waves
Ultrasonic waves
Supersonic waves
Ultraviolet waves
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Question # 15
When temperature increases, frequency of an organ pipe
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Decreases
Increases
Remain the same
Become zero
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Question # 16
The pitch of sound depends on its
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Wavelength
Frequency
Wave amplitude
Harmonic content
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Question # 17
Which of the following gives discrete emission spectrum.
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Sun
Candle
Incandescent filament
Mercury vapour lamp
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Question # 18
Velocity of sound in air at a given temperature.
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Increases with increase in pressure
Decrease with increases in pressure
Is independent of pressure
Becomes quadruples
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Question # 19
Which term best describes the nature of light from modern view point.
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Waves
Rays
Particles
Photons
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Question # 20
During a thunderstorm, an observer sees a lighting flash Six second later he hears the thunder The speed of sound is 330 m s-1. Approximately how far away is the observer from the lighting.
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1/2 km
1/3 km
2 km
1/20 km
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Question # 21
Light from the sun reaches the earth in
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Spherical wave fronts
Cylindrical wave fronts
Plane wave fronts
Packets
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