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Published on: 26/05/2021
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Download CBSE Class 11th Standard CBSE Physics question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 11th Standard CBSE Physics
Questions + Answers key
Take MCQ Physics Test1.
What is the quantity transmitted with propagation of longitudinal waves through a medium?
2.
What is the nature of water waves produced by a motorboat sailing in water ?
3.
How speed of sound waves in air varies with humidity?
4.
The displacement of an elastic wave is given by the function y = 3sin \(\omega \)t + 4cos\(\omega \)t Where, y is in cm and t is in second.Calculate the resultant amplitude.
5.
Sound waves of wavelength \(\lambda \) travelling in a medium with a speed of vm/s enter into another medium where its speed is 2vm/s.Wavelength of sound waves in the second medium is
1.
Propagation of longitudinal waves through a medium leads to transmission of energy through the medium.
2.
Water waves produced by a motorboat sailing in water are both longitudinal and transverse.
3.
Speed of sound waves in air increases with increases with increase in humidity. This is because presence of moisture decreases the density of air.
4.
The resultant amplitude will be
y=\(\sqrt{y_2^1+y_2^2}=\sqrt{9+16}=\sqrt{25}=\)5cm
5.
Frequency in the first medium, v =v/λ
Frequency will remain same in the second medium, as the source.
⇒v, =v ⇒ 2v/λ′ = v/λ ⇒ λ′ = 2λ
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