HSSC-I (Class-11) Solved Physics MCQs; Unit-8: Waves (Baluchistan Textbook Board, Quetta) With Verified Answers 



1. Waves a mechanism that transmits




... Answer is D. Energy
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2. The wave which requires a medium for its propagation is known as




... Answer is A. Mechanical waves
Transverse and longitudinal waves


3. Longitudinal wave consists of




... Answer is B. Compression and rarefactions
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4. Transverse wave is different from longitudinal wave because it possesses a property of




... Answer is D. Polarization
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5.  Due to high elasticity, the speed of sound is maximum in




... Answer is A. Solids
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6. The speed of sound does not depend upon;




... Answer is D. Pressure
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7. Which of the following phenomenon is based on the superposition principle :




... Answer is A. Interference
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8. When two waves of the same frequency and traveling in the same direction are superimposed then we have




... Answer is A. Interference
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9. Which one of the following changes can be observed in the resultant interference wave?




... Answer is A. Amplitude
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10. How many beats can be observed when the difference in frequencies of two waves is two




... Answer is B. 2`
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11. The length between the node and antinode is;




... Answer is A. `\frac {λ}{4}`
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12. Which one of the following waves does not transmit energy




... Answer is B. Standing wave​
Standing waves are also called stationary waves


13. The ratio of the fundamental frequency of an open-ended pipe to a pipe whose one end is closed is;




... Answer is C. 2:1
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14.  The number of quantization frequency of the stationary waves in pipe when one end is closed is,




... Answer is B. Natural number
n = 1,2,3,4,5, ...........


15. When a wave is reflected from a denser medium to a rare medium then there is a phase change of




... Answer is C. π
Ï€ = 180°


16.. The sound which stimulates our ear is known as;




... Answer is B. Infrasonic
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17. Which one of the following parameters of a wave does not change when it transmits through two different media :




... Answer is C. Frequency
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18. Piezoelectric effect means to produce electricity by




... Answer is C. Pressure
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