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PPSC Physics Topic 5 Waves and Wave Properties of Light
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Total Questions20
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Time Allowed20
PPSC Physics Topic 5 Waves and Wave Properties of Light
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Question # 1
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.
Question # 2
Sound wave do not travel in vacuum because.
Question # 3
The amplitude of sound wave determines its
Question # 4
On average there is no energy transfer in.
Question # 5
When two waves travelling through the same medium arrive at the same point 180 o out of phase, they give rise to.
Question # 6
Wave motion in air consist of
Question # 7
The sweetness or harshness of a sound depends upon its
Question # 8
Which of the title for combining of notes that produce jarring effect on the ear.
Question # 9
Which type of oscillations produce resoncance.
Question # 10
A longitudinal sinusoidal wave has a wavelength of 1 cm and a period of 2s. Its wave velocity is.
Question # 11
All particles, of a wave front vibrate
Question # 12
Polarization of light shows that light is.
Question # 13
We can hear beats when the difference in the frequencies of two sounding bodies is not more than.
Question # 14
What will be the effect on the speed of a Transerv wave in a string. If tension is made 4 times.
Question # 15
Two tuning forks have same natural frequency One of them is now loaded with wax. When both the forks are sounded together the will
Question # 16
Michelson's interferometer can b e sued to find
Question # 17
Maximum number of orders available with a grating is.
Question # 18
The loudness of a sound depend on its
Question # 19
We get light inside a room in a day time due to
Question # 20
Which term is used for the persistence of sound in a hall.
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